(let’s use D as a variable)
⅗ of the remainder = ⅗ of $12,000 = $7200
Insurance + Financing (let’s use I and F as variables)
⅕ of total (not the remainder) = ⅕ of $18,000 = I+F = $3600
Since I = 3F we can substitute and say 3F+F = $3600 so
The last step is to figure out the amount of taxes and licensing fees (let’s use T for that sum):
Correct answer is thus D.
5. (and 6/7) There was no need to pivot in your approach at any point since you must just do the calculations carefully in this problem. It is very important that you re-read the question and you double check that no careless errors were made in the calculations to get there. People get this question wrong because there are so many steps and thus many opportunities to make calculation mistakes or interpretation mistakes. Note: all of the calculations in this problem can easily be done mentally, so if you are writing much down beyond the totals for each component in this problem, you should work on your calculation fluency.
To succeed in Problem Solving you must learn how to be flexible and creative in your approach to each problem, and you must focus on precision in wording. Everyone understands that you must possess the requisite math knowledge to do well, but in general people spend too much time on raw math and not enough time on math + everything else that makes these questions difficult (and relate more to what GMAC is really trying to assess with this exam).
While it is smart to start your studying process with some raw math skills work, make sure you quickly move into full official GMAT problems, so you can work not just on the underlying math, but also on “everything else.” With the right type of preparation , you can master all the different elements required to succeed in GMAT Problem Solving questions and knock your quant score out of the park!
Chris Kane is an mba.com Featured Contributor.
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The GMAT Quantitative Section is designed to test your quantitative reasoning—your ability to think logically about quant concepts. It covers basic math concepts, including arithmetic, algebra, statistics, and more but it’s not truly a math test (though it can certainly feel like it). The section contains only one problem type: Problem Solving.
You will need to relearn many of the quant skills you first learned in high school (or earlier!). And you’ll need to learn strategies for approaching Problem Solving questions, as efficiently as possible.
Finally, you do not get a calculator on the Quant section of the GMAT—so you will have to do your math work by hand.
You’ll have 45 minutes to answer 21 Quant problems or an average of 2 minutes per problem.
[ RELATED: GMAT Practice Tests ]
Problems may be written in “pure math” form or in “story” form, so you’ll also need skill in translating a story into the necessary math concepts to solve.
While you do need to know various rules and formulas, the GMAT is explicitly designed to allow you to take advantage of shortcuts—estimation, testing out a few real numbers, and so on. The GMAT isn’t all that interested in precise calculations; rather, the test mimics the real-world usage you can expect in business school and the working world.
For example, business schools are interested in knowing whether you understand quant concepts well enough to do some quick back-of-the-envelope calculations to determine a rough answer to the CEO’s question—7,500 is good enough; 7,462.39 is unnecessary. Or whether you are able to realize that the sales forecast numbers your coworker just handed you don’t make logical sense—even though you haven’t performed the precise calculations yourself.
[ RELATED: GMAT Math Basics ]
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Problem Solving (PS) is the classic multiple-choice math problem: They give you some info, they ask you a question, and they give you five answer choices with numbers or variables in them.
Unlike DS, you are actually going to have to solve the math to get to the answer. But PS will at least feel a lot more familiar right from the start.
Be careful, though! Because PS problems feel more familiar, you’re going to be more tempted to use the textbook solution methods you learned in school. But a lot of PS problems can be solved much more efficiently by using various test-taking strategies—estimating, testing out some real numbers, trying the answers.
Standardized tests are literally built (on purpose!) for you to take advantage of these strategies to save time. In fact, someone who tries to solve all of the math problems in the “old school” way will most likely run out of time before they can finish the test. The GMAT is not really a math test. In the real world, it’s good enough to know that revenues were up approximately 10% this quarter; if you take the time to calculate and tell your boss that revenues were up 9.843% this quarter, she’s going to think that you’re wasting your time.
As you get ready for the GMAT, train yourself out of your “old school” mentality and into your “executive mindset” mentality: What’s the quickest, easiest way to get to the answer—without making a mistake?
At a particular school, 65% of the students have taken language classes. Of those students, 40% have studied more than one language. If there are 300 students at the school, how many have studied more than one language?
First, read the question and jot down the information given:
Glance at the answers (before doing any work.). They’re pretty spread apart, indicating that you can estimate at least a little.
The first step is to figure out how many students take language classes. 65% is a little less than two-thirds (or 66.7%), so use two-thirds to estimate. Two-thirds of 300 is 200, so approximately 200 students have taken language classes.
Is that value, 200, a little bit of an overestimate or a little bit of an underestimate?
Because the real percentage (65%) is a little less than the percentage actually used (two-thirds, or 66.7%), the value of 200 is a little bit greater than whatever the exact 65% figure would be. In other words, 200 is a little bit of an over estimate.
Next, here’s the source of one of the trap answers. The 40% who have taken more than one language class is not 40% of the total number of students. Rather, it’s 40% of just the 65% who’ve taken language classes. So the next step is to take 40% of the 200 figure.
That’s not a terribly hard calculation to do…but get out of your “old school math” mindset. Don’t do calculations that you don’t absolutely have to do! 40% is less than 50%, so 40% of 200 has to be less than 100.
Answer and Explanation
The correct answer is (A). 78. Only one answer choice is less than 100.
What if the answers had instead been these:
In that case, you can still do the first estimation (using two-thirds rather than 65%), but calculate more precisely on the second step. Here’s how:
80 is a little bit of an overestimate (since you overestimated on the first step), so the correct answer in the second set of answers is the one that’s a little less than 80—answer (B) 78.
To calculate percentages quickly, find benchmarks like 50%, 10%, 5%, 1% first, and then multiply or add them up to get to the percentage that you want. If you needed 12%, for example, then you could find 10% and 1% and then add up 10% + 1% + 1%.
[ RELATED: Quantitative Strategies for the GMAT ]
The GMAT Quantitative section is scored on a scale from 6 (low) to 51 (high). Most schools want to see a score of at least 40 and the most competitive schools are typically looking for a Quant score of 45 or higher.
Your Quant, Verbal, and Data Insights scores are also combined into your Total score, which ranges from 205 (low) to 805 (high). The Total score is the score that schools care about most (followed by your Quant score, for most schools). An average GMAT score is about 545; top-10 business school programs report average scores for their students in the 665 to 695 range.
Review What’s a Good GMAT Score to learn how to determine what kind of goal score will help to make you competitive at your target programs.
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To master GMAT Problem Solving, you’ll need to develop the following skills:
A firm grasp of basic, high school math concepts
The ability to avoid careless errors
Good time management
A flexible and creative mindset
Although GMAT Problem Solving questions are rooted in fundamental, high school-level math concepts, they often require a limber approach that you can’t find in any textbook. Our tips for GMAT Problem Solving will help you thrive on these questions – no matter what the exam throws at you.
The following are some of the most common math topics that appear in GMAT Problem Solving questions:
● Arithmetic ● Rates
● Algebra ● Probability
● Geometry ● Combinatorics
● Exponents ● Statistics
● Percents ● Number Properties
● Ratios
The first step to mastering GMAT Problem Solving is to develop accuracy on algebra, arithmetic, and number properties. Since those three topics appear in more than two-thirds of GMAT quant questions, students should give them priority when developing GMAT Problem Solving study plans.
Although many students obsess over the more exotic topics listed above (such as combinatorics, probability, and rates), these topics collectively represent less than 10% of GMAT Problem Solving questions. So if you need to make a big improvement in your GMAT Problem Solving performance, spend the bulk of your time developing your accuracy on algebra, arithmetic, and number properties.
The GMAT is an adaptive exam, which means that when you answer GMAT questions correctly, the test will give you harder questions as you move through the section. If you get a bunch of easy Problem Solving questions wrong, on the other hand, your quant score will plummet. For this reason, avoiding careless errors on easy questions is essential to mastering GMAT Problem Solving.
The best way to avoid careless mistakes is to practice the following three steps on every GMAT Problem Solving question you tackle:
Read carefully . Many students miss GMAT Problem Solving questions not because they fail to understand the math, but because they miss a key detail in the question.
Plot an efficient path forward . There are usually several different ways to solve any given GMAT Problem Solving question. If you take a few moments to think through your options before jumping in, you’re more likely to choose an efficient path that avoids tortuous algebra and arithmetic – and you’re far less likely to make a careless error.
Check your work as you go . Don’t wait until the end of the problem to check your work. By catching careless errors as soon as possible, you’ll make the best use of your precious time and energy.
The best time management strategy for GMAT Problem Solving is to avoid wasting time on questions that you can’t solve efficiently. Because the GMAT is an adaptive test, most test-takers will answer 30-50% of all quant questions incorrectly – even if they ultimately get an excellent quant score. So you’ll need to be prepared to guess and move on when you’re overmatched by a GMAT Problem Solving question.
The best approach to GMAT Problem Solving is to read the question twice, and then plot your path forward towards a solution. If you think you’re on track for an efficient answer to the question, great – solve the question, double-check your work to avoid silly mistakes, and continue to the next question. But if you don’t see a good path forward on a GMAT quant question, then you’ll want to guess and move on quickly.
By following this strategy, you’ll spend the majority of your 62 minutes actually solving problems, and waste relatively little time clawing away at questions that you likely wouldn’t get right anyway.
Another benefit of good time management is that you won’t find yourself rushing towards the end of the section. Rushing often leads to careless errors, and as we’ve already discussed, careless errors will seriously damage your GMAT Problem Solving performance.
For more, check out this video on how to manage your time on adaptive tests like the GMAT.
While a strong understanding of fundamental math concepts is essential, you’ll need more than just content knowledge to master GMAT Problem Solving. In fact, students often perform better on GMAT Problem Solving when they stop thinking of it as “math” and start thinking of it as “quantitative reasoning.”
For most high school students, math is taught as sequences of mechanical steps to be memorized and followed. GMAT Problem Solving questions, on the other hand, often come with a twist. By presenting familiar math topics in unfamiliar contexts, they challenge students to be both flexible and creative in their approach.
Consider the following problem as an example:
If you think of this as a mechanical “math question,” you’ll follow some well-worn steps here: find some common denominators, add the fractions, and THEN compare the sums. But if you’re thinking of the GMAT as “quantitative reasoning,” maybe you’ll try something quicker, smarter, and less arithmetic-intensive.
For instance, since we’re just looking for the greatest value, we don’t care what that value actually is. As long as we know that it’s larger than the other four expressions, we’ve found the correct answer. So since the question is asking for the greatest of the five answer choices, you can just compare pairs of answer choices, and knock off anything that’s the smaller of the two.
Let’s start with (D) and (E). It’s easy to see why (E) is larger than (D) once you notice that 1 – ½ = ½, so (D) is gone.
Similarly, (B) looks a lot like (E), except that the denominators in (B) are squared – and since larger denominators mean that the fractions must be smaller, we can cross off (B). The same argument holds for (C) – it’s clearly smaller than (E) as well. And then (A) has smaller denominators than (E) – so (A) is your answer.
Overall, if you’re thinking of GMAT Problem Solving as a set of narrow mathematical tasks, then you’re barking up the wrong tree. Once you start looking for opportunities to apply flexible logic and identify multiple solution paths, then you’re on the right track.
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What math is on the gmat topics, questions, and review.
The Quantitative section of the GMAT strikes fear into the hearts of many test takers who haven’t taken a math class in years. If you’re one of those test takers, you shouldn’t worry! You can totally handle the math in this section.
While the Quantitative section is challenging, it doesn’t test especially advanced concepts. This guide will show you what math is on the GMAT, along with key tips on how to prepare.
First, let’s discuss a general overview of GMAT math.
The GMAT Quantitative section is your third section on the GMAT. You’ll take it after the 30-minute Analytical Writing Assessment, 30-minute Integrated Reasoning section, and an optional eight-minute break.
The Quantitative section is the first adaptive section on the GMAT, meaning that the questions change to match your ability level. You’ll start out with some medium level GMAT math questions, and the problems will get easier or harder depending on how you’re doing.
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The GMAT math section will continue to give you customized questions to get a more and more accurate measure of your skills. This adaptive format allows for comparable scores across different tests, plus it enhances security since no two tests look exactly the same.
You’ll get 31 GMAT math questions in 62 minutes, leaving you with approximately two minutes per question. Unlike the Integrated Reasoning section, you won’t have access to a calculator. You will get some note boards and markers to write out your work.
While you’ll need to know a variety of math concepts for this section, you’ll only see two question types. Read on to learn what they are.
There are just two types of Quantitative questions, and they’re interspersed throughout the section in random order. The two types are problem solving questions and data sufficiency questions.
Typically, about two-thirds of GMAT math questions will be problem solving and one-third will be data sufficiency. However, this proportion could change depending on how many experimental questions you get of each type.
Problem solving questions are just like any other typical question you’d get on a math test. They may ask you to solve an equation, figure out a word problem, or answer questions on a graph.
Each question has five answer choices, and there’s only one right answer for each. Where these questions do get tricky is when they require multiple steps or abstract thinking.
Here’s one example of a problem solving question on the Quantitative section of the GMAT.
The second type of Quantitative question, data sufficiency problems, are more unusual. These questions present you with a math problem followed by two pieces of information. You don’t have to solve the problem, but rather indicate whether one or both statements give you “sufficient data.”
Here’s an example of a GMAT math data sufficiency problem.
The answer choices for data sufficiency questions are always the same as the ones you see above. You don’t need to solve the initial problem. You just need to know if you could solve the problem based on the given information.
While there are only two question types in the Quantitative section, there are quite a few more concepts that show up. Below, you’ll find an overview of the tested GMAT math concepts, along with sample problems for each one.
As you read above, the Quantitative section doesn’t require you to be a mathematician. Your GMAT math review won’t involve advanced calculus or trigonometry. In fact, the GMAT math topics don’t get much more advanced than high school-level algebra.
The main challenge for a lot of people, then, is reviewing concepts that they studied in the past but haven’t used in a long time. The main skills you need to answer both question types involve arithmetic, algebra, geometry, and word problems.
Let’s take a closer look at the topics within each of these skill areas as outlined by the official GMAT Prep Software , starting with arithmetic.
You’ll get a variety of problems that require skills in arithmetic. You shouldn’t have to do particularly advanced calculations, since you won’t have use of a calculator, but the questions may require some strategic problem solving and complex thinking.
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For arithmetic math in the Quantitative section, you should be familiar with
The problem below, for example, is a problem solving GMAT math question that involves fractions and percents.
This second sample problem is a data sufficiency question that calls on your arithmetic and logic skills.
In addition to arithmetic, another major skill area is algebra. As part of your GMAT math review, you definitely want to get work with algebraic expressions and solve for variables. You should be comfortable with
The sample question below is a typical problem solving question that involves an algebraic expression with two variables and an exponent.
Data sufficiency questions may also call on your algebra skills, like in the practice question comparing two variables below.
You won’t find quite as many questions on geometry as on arithmetic and algebra, but they definitely still come up. To prepare, you should study the following concepts:
This problem solving question, for instance, asks about properties of triangles.
This data sufficiency question requires you to have some understanding of angles and how they relate to one another.
Word problems may call on arithmetic, algebra, or geometry skills, plus they require careful reading to identify exactly what the problem is asking you to do.
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You might be asked to calculate simple interest or compound interest, calculate rate, or measure profits. You also may have to work with data from a table, line chart, bar graph, scatter plot, or pie graph. Finally, a question may ask you to analyze sets, as presented in Venn diagrams, or analyze probability.
These are some typical concepts you need to understand to solve GMAT word problems.
This problem solving practice question asks you to calculate how fast the Earth travels around the sun. You need to convert miles per second into miles per hour.
This data sufficiency question is a word problem that calls on your arithmetic and logic skills.
Knowing what math is on the GMAT is an important first step, but what else can you do to prepare for the Quantitative section? Read on for six key tips on getting ready for GMAT math.
How can you get ready for the problem solving and data sufficiency questions on the Quantitative section? What can you do to review concepts that you may not have seen since high school?
Read on for six tips to guide your GMAT math review.
As you read above, GMAT math doesn’t involve particularly advanced concepts. You won’t need calculus, trigonometry, or any college-level mathematics.
Your first step in preparing, then, should be to review fundamental math concepts. You need to have a solid foundation of key concepts in arithmetic, algebra, and geometry, plus a firm grasp of logic and analysis that will help you solve word problems.
Make sure your study materials offer a thorough review of all tested concepts, and take time to work through the lessons.
As you review key concepts, you should reinforce your understanding with GMAT math practice problems. Even though the math in the Quantitative section isn’t particularly advanced, the questions are still challenging.
They often require complex thinking and multiple steps. Even if you know how to calculate the area of a right triangle or solve a quadratic equation, you need to make sure you can apply that knowledge to GMAT math questions.
By drilling with realistic practice questions, you’ll learn how to apply your math knowledge to the GMAT. The best practice questions come from the official test makers, as on the GMAT Prep Software. Third party test prep companies, like Kaplan and Manhattan Prep, also offer useful practice questions and tests.
As you answer the questions, take notes on anything that confuses or trips you up. Take time to read answer explanations and find the source of your confusion. By understanding your mistakes, you can take specific steps to fix them.
After you’ve done initial concept review and tried out some practice problems, you should set aside time to take a timed GMAT practice test. Find a quiet place, take a practice test with a computer adaptive format, and give yourself 62 minutes to complete the section.
After you’ve finished the practice test, take time to review any questions that you got wrong or felt unsure about. Try to locate the source of your error.
Were you running out of time? Did you misunderstand what a question was asking you to do? Did you make an arithmetic mistake? Were you unfamiliar with a concept? Did you simply make a careless error?
By figuring out where you went wrong, you can take the right steps to fix it for next time. The practice test will not only help you figure out what concepts you need to review, but it will also give you feedback on your pacing. Doing well on the Quantitative section requires you to work quickly and efficiently, and taking practice tests will help you improve your test taking rhythm.
Data sufficiency questions are weird; there’s no doubt about it. You won’t really see questions like them anywhere but on the GMAT.
To minimize confusion, you should familiarize yourself with the answer choices before test day. You’ll always see the same five answer choices that ask whether statement 1, statement 2, both, or neither give you sufficient information to solve the problem.
Remember that you don’t need to solve these problems, but rather indicate whether you have enough information to solve them. Memorize the answer choices before test day so you know exactly what you’re looking for in each data sufficiency problem and don’t have to waste time reading through or trying to differentiate between the answer choices.
As goes the mantra of high school math teachers everywhere, make sure to show your work. You can’t use a calculator in the Quantitative section, and mental math will only get you so far.
You’ll get note boards and markers in the testing center to write out your work. You should definitely use them to work through the challenging, often multi-step problems.
Try to be neat and organized so you don’t run out of room or make a careless error. If your answer doesn’t match any of the answer choices, then you may need to comb through your work to find the calculation mistake. Try to keep everything legible to make things easier on yourself.
These note boards won’t be graded and are entirely for your own use. You can use them on any of the GMAT sections, but they’re especially helpful when solving math problems.
As a skill like any other, GMAT math demands a lot of dedicated practice. Whether or not you consider yourself a “math person,” you should set aside time to review concepts, answer sample questions, and take practice tests.
Not only will you sharpen your math skills, but you’ll also become a more efficient test-taker who can handle answering 31 questions in 62 minutes. Don’t get discouraged, but know that you can improve with effort, time, and a customized study plan.
To prepare for the Quantitative section of the GMAT, you should focus on fundamental concepts of arithmetic, algebra, and geometry, plus you need to prepare for word problems. You’ll answer two types of questions, the straightforward problem solving questions and the more unusual data sufficiency questions.
After months of GMAT math review, you can go into the test familiar with these question types. You can hone your time management skills by taking timed practice tests. You’ll also find that the math section gets more and more manageable as you answer lots of GMAT practice questions.
You don’t need to be a math person to do well on the GMAT Quantitative section, but you do need to spend time preparing. With enough effort, you can sharpen skills that you first developed in high school and get yourself ready to conquer GMAT math.
Now you’re an expert in GMAT math, but do you know what the rest of the exam looks like? Check out our guide to the full GMAT structure and format , along with examples of each question type across the test.
Do you know how the GMAT is scored? Check out our complete guide to GMAT scoring , and then head to this article to see how section and total scores correspond to percentiles.
The GMAT is a daunting test, but how hard is it, really? This article tackles that complicated question to show you just how challenging you can expect the GMAT to be.
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Study concepts, example questions, & explanations for gmat math.
The Graduate Management Admissions Test is a hurdle that many potential business students must face. The Quantitative Reasoning portion is probably the more feared section of the GMAT for most examinees. Many examinees will have flashbacks to high school or undergraduate math, and may anticipate complicated mathematical questions, elaborate graphs, and intimidating geometry. Whether you need GMAT tutoring in Atlanta , GMAT tutoring in Houston , or GMAT tutoring in San Francisco , working one-on-one with an expert may be just the boost your studies need.
The GMAT Quantitative Reasoning exam does in fact test challenging mathematical concepts that you may have not seen in some time. However, with proper preparation, you can face the questions with confidence. The section consists of thirty-seven questions administered over seventy-five minutes. Of these, you can anticipate about two-thirds to be fairly straightforward questions consisting of a problem you are asked to solve by choosing the correct answer from multiple presented options.
The remaining questions are of a second type that is a bit more abstract. These are called the sufficiency questions, which ask you to make a judgment. Is enough information provided for you to be able to solve the question, or can you not determine the answer based on what you are told? Consider the following simple question:
If X and Y are positive integers, what is their sum?
1. X and Y have a difference of 50
2. X is the product of (Y/2) x 4
In answering this question, your challenge is to determine if you can figure out the sum of X and Y using just the information in either point 1 or point 2, if you need both point 1 and point 2 together to be able to solve the problem, or if you need more information than is provided in point 1 and point 2 taken together.
Most students find that the additional consideration of sufficiency to make these problems much more challenging than the relatively straight-forward problem-solving questions. Some students may consider these sufficiency questions to be the hardest questions they attempt on test day. Varsity Tutors also offers resources like a free GMAT Math Practice Tests to help with your self-paced study, or you may want to consider a GMAT tutor .
The GMAT Quantitative Reasoning exam is tests your ability to think critically and to reason. Developing these skills through practice, collaboration, and reflection can be far superior to any shortcuts to a higher score. Consider working with tutors who have their own history of success with the GMAT Quantitative Reasoning test, as they can often help you fast track your initial progress substantially. In addition, explore Varsity Tutors’ free GMAT Math resources. You may find that our GMAT Math Help page is a great place to get started in improving your understanding of challenging mathematical concepts or question types like sufficiency questions. Our GMAT Math Help provides example problems which are answered and fully explained, allowing you to walk through the process of solving a challenging question as guided practice. We organize our GMAT Math Help content in differing levels of specificity, so whether you want to see examples of sufficiency questions in general or questions specifically about factoring, you can do so easily. After improving your understanding of the question types and concepts that you find to be most challenging, you can practice answering these types of problems on your own by using our other free GMAT Math resources. In addition to the GMAT Math Help Section and GMAT tutoring , you may also want to consider using some of our GMAT Math Flashcards .
The skills that the GMAT’s Quantitative Reasoning section tests are the same skills that are demanded in management programs and in managerial careers. You can give yourself a major advantage in the future by investing time and effort now. Also, consider that the GMAT is one of the only objective ways for admissions officers to evaluate different candidates. Your college may be dramatically different from the college of another applicant in terms of grading scale or grading rigor. A substantial difference in GPA may not be indicative of a difference in ability, and the GMAT is the best way for you to demonstrate your capacity for learning and success in an objective and convincing way. You can view the GMAT Quantitative Reasoning exam as an opportunity to showcase your abilities instead of simply one more hurdle to overcome. Take advantage of this chance to demonstrate why you belong in one of the best business schools!
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If you are currently studying for the GMAT and are in the thick of your prep, you already know the importance of practicing GMAT math problems. To help with your practice, we’re presenting you with a representative selection of GMAT math problems with solutions. Of course, practicing the questions here is just a start. If you need more practice after completing what we offer in this article, please check out the Target Test Prep Online GMAT Course .
An overview of the gmat quant topics, each major gmat quant topic can be broken down into subtopics, problem-solving example 1: quadratic equations, problem-solving example 2: number properties, problem-solving example 3: exponents, problem-solving example 4: general word problems, problem-solving example 5: rates, problem-solving example 6: percents, problem-solving example 7: combinations and permutations, problem-solving example 8: absolute value, what’s next.
Before we jump into examples of GMAT math questions, let’s discuss some key basics of GMAT quant.
Here is the good news regarding the topics in the GMAT quantitative section. They are similar to those you studied in high school. So, as you jump into your GMAT math prep or even take practice tests, I’m sure many concepts and techniques will come back to you.
However, as you may have already discovered, the math questions you see on the GMAT are not the same types of questions you saw in high school. The GMAT will test your ability to evaluate math analytically. So, you will train new math “muscles” as you learn GMAT quant .
Although the topics tested on the GMAT are similar to those you saw in high school, the ways in which the questions are asked may not be familiar.
Here is the list of the quant topics tested on the GMAT.
It’s important to understand that each of these 21 major math topics includes a number of subtopics.
I often speak with students seeking GMAT math help. In those conversations, I help them analyze their math weaknesses. Most students will look at the macro list and say something like “I struggle with Number Properties.” While such statements are helpful, it’s much more important to understand students’ struggles on a more granular level.
For example, Number Properties includes many subtopics, such as even/odd numbers, positive/negative numbers, divisibility, remainders, the least common multiple, and the greatest common factor, to name a few. It’s possible that a student could excel in some of these subtopics and not in others. So, simply identifying that you struggle with Number Properties, at the end of the day, provides limited information.
Thus, when you’re analyzing your GMAT quant skills, it’s important to look at how you perform on a subtopic, not just a broad area of quant!
There are 21 major quant topics on the GMAT, but each main topic includes multiple subtopics.
Let’s now discuss GMAT problem-solving questions in a bit more detail.
The GMAT Quantitative Reasoning section presents you with 21 problem-solving questions, and you have 45 minutes to answer them. GMAT Problem-Solving (PS) questions are a type of question with which you are likely already familiar. This multiple-choice question type presents five answer choices: A, B, C, D, and E, and there is only one correct answer for each question.
Any concept could be tested in a PS question, including all 21 topics we listed previously. To get a feel for how the GMAT presents these questions, let’s do some GMAT PS practice questions. You’ll notice that each sample question is categorized by major topic and subtopic.
Major Topic: Quadratic Equations
Subtopic: The Difference of Squares
What is the value of 998^2 – 2^2?
If we recognize this question as a difference of squares, we can solve it in less than 30 seconds, doing all the calculations in our heads.
We can recall the fact that, for any numbers a and b, a^2 – b^2 = (a – b)(a + b), we can apply this equation to the expression in the question stem, with a = 998 and b = 2. Thus, we can re-express 998^2 – 2^2 as follows:
998^2 – 2^2 = (998 – 2)(998 + 2) = (996)(1,000) = 996,000
Note that we could have instead solved this question by performing the unwieldy and time-consuming calculation of 998^2, and then subtracting 4. But, instead, by knowing and applying the difference of squares concept, we have avoided the risk of making an arithmetic mistake, and we’ve gained valuable extra time for solving later questions in the quant section.
Major Topic: Number Properties
Subtopic: Units Digit Patterns
What is the units digit of 7^15?
When we raise the base 7 to successive integer powers, a pattern of the units (ones) digit is revealed. Let’s determine that pattern now by calculating the first few powers of 7.
7^1 = 7 units digit is 7
7^2 = 4 9 units digit is 9
7^3 = 34 3 units digit is 3
7^4 = 2,40 1 units digit is 1
7^5 = 16,80 7 units digit is 7
So, we see that the units digits of powers of 7 have a repeating pattern of 4 numbers: 7-9-3-1. Thus, every 4th exponent has the same units digit. For example, we see that 7^4, 7^8, 7^12, … etc., will all have the same units digit of 1.
Therefore the most straightforward way of determining the units digit of 7^15 is to find an exponent that is a multiple of 4 close to 15. We know from our pattern that 7^16 must have a units digit of 1. Now, using the pattern 7-9-3-1, we know that 7^15 must have a units digit of 3.
Major Topic: Exponents
Subtopic: Solving Exponential Equations by Combining Exponential Expressions With Like Bases
If 16 x + 2 * 8 6 = 32 6 , then x is equal to which of the following?
First, notice that we can’t combine any of the expressions in the equation until we re-express the terms with like bases. In this case, the current bases, 16, 8, and 32, can all be expressed as powers of 2. So, we will use the facts that 16 = 2^4, 8 = 2^3, and 32 = 2^5 to rewrite the equation.
16 x + 2 * 8 6 = 32 6
(2 4 ) x + 2 * ( 2 3 ) 6 = ( 2 5 ) 6
2 4x + 8 * 2 18 = 2 30
So now that all terms in the equation have the same base, we can combine them, using the fact that when we multiply two terms with like bases, we add the exponents:
2 4x + 8 + 18 = 2 30
2 4x + 26 = 2 30
We can now use the fact that when we have two exponential expressions with like bases on either side of an equation, we can equate the exponents.
4x + 26 = 30
Major Topic: General Word Problems
Subtopic: Age Problems
Marla is 20 years older than Angelina. In 5 years, Marla will be 3 times as old as Angelina. What will Marla’s age be in 3 years?
First, let’s define our two variables:
M = Marla’s age today
A = Angelina’s age today
Next, we can write two equations from the information presented in the problem stem.
Since Marla is 20 years older than Angelina, we have:
M = A + 20 (equation 1)
Since in 5 years, Marla will be 3 times as old as Angelina, we have:
M + 5 = 3(A + 5)
M + 5 = 3A + 15
M = 3A + 10 (equation 2)
Next, from equation 1, we can substitute A + 20 for M in equation 2, and then solve for A:
A + 20 = 3A + 10
Finally, we see that Angelina is 5 years old. Thus, Marla is currently 5 + 20 = 25 years old. So, in 3 years, Marla will be 28 years old.
Major Topic: Rates
Subtopic: Average Rates
Paul walks from home to work at a rate of 5 mph and bikes home from work along the same route at 12 mph. What is his average speed for the round trip?
Since we have an average rate question we can use the following formula:
average rate = total distance / total time
Since the distance is the same in both directions, we can use a smart number to represent the one-way distance. A good number to use would be one that is divisible by both 5 and 12, so we can let the distance each way = 60.
So, the time going to work is 60/5 = 12, and the time going home from work is 60/12 = 5.
Finally we can determine the average rate:
average rate = (60 + 60)/(12 + 5)
average rate = 120/17
Major Topic: Percents
Subtopic: Percent Translations
If p is 500 percent of q, and q is 400 percent of z, then z is what percent of p?
First, we can note that 500% of a number is equivalent to 5 times that number, and 400% of a number is equivalent to 4 times that number. With these facts in mind, we can create two equations:
p = 5q (equation 1)
q = 4z (equation 2)
We can substitute 4z for q in equation 1:
p = 20z (equation 3)
Now, to find out what percent z is of p, we can divide these two quantities and multiply the result by 100:
Finally, we can simplify this expression if we use equation 3, plugging in 20z for p:
z/p ✕ 100 = z/20z ✕ 100 = 1/20 ✕ 100 = 100/20 = 5
Thus, z is 5% of p.
Major Topic: Combinations and Permutations
Subtopic: Choosing Multiple Items in a Combination Problem
A treasure chest contains 5 different rubies, 4 different emeralds, and 3 different diamonds. If a pirate picks 5 jewels from the chest, 3 of which are rubies, how many possible ways exist for him to pick the jewels?
First, he chooses 3 rubies out of 5. Since the order doesn’t matter, we use combinations to count the number of possibilities. Recall the formula for a combination choosing k objects out of n objects is nCk = n! / k!(n-k)!. Thus, the number of ways to choose just the 3 rubies is:
5C3 = 5! / 3!(5-3)! = 5! / 3!(2)! = 5x4x3x2x1 / 3x2x1x2x1 = 20 / 2 = 10
Now, there are 2 remaining choices to make, and there are 7 non-rubies remaining in the chest. Thus, the number of ways to choose the 2 jewels out of 7 is:
7C2 = 7! / 2!(7-2)! = 7! / 2!5! = 7x6x5x4x3x2x1 / 2x1x5x4x3x2x1 = 42 / 2 = 21
There are 10 ways to choose the rubies and 21 ways to choose the remaining jewels.
Therefore, the total number of ways to choose the 5 jewels is 10 ✕ 21 = 210.
Major Topic: Absolute Value
Subtopic: Evaluating Absolute Value Equations
If |3y – 2| = 1 and y^2 < y, then what is the value of y?
First, we can solve this absolute value equation for two cases: when (3y – 2) is positive and when (3y – 2) is negative, as follows:
Case 1: 3y – 2 is positive.
3y – 2 = 1
Case 2: 3y – 2 is negative.
-(3y – 2) = 1
-3y + 2 = 1
The absolute value equation has two solutions: y = 1 and y = 1/3.
Now, we don’t know which value of y to choose as the answer. We use the given fact that y^2 < y. Let’s test each possible answer, either y = 1 or y = 1/3.
If y = 1, then y^2 = 1. Thus, y cannot be equal to 1.
If y = 1/3, then y^2 = (1/3)^2 = 1/9, and we see that since 1/9 < 1/3 , then y^2 < y.
Thus, the correct answer is 1/3.
We could have skipped these last steps by recalling a fact from Number Properties: The only way that y 2 can be less than y is if y is a positive proper fraction — that is, if y is between 0 and 1.
Now that we have practiced many problem-solving questions, let’s shift the conversation to Data Sufficiency questions.
GMAT quant covers 21 major math topics from the disciplines of arithmetic, algebra, coordinate geometry, number properties, and statistics.
The 21 questions in the Quantitative Reasoning section are all 5-option multiple-choice problem-solving questions. In this article, we have looked at 8 example questions that run the gamut of topics that you might encounter in the GMAT quant section.
The two keys to success on GMAT quant are knowledge of the 21 topics that are tested and familiarity with what you might encounter. In this article, we have provided you with 8 example questions covering Problem Solving questions.
Another subtopic from Number Properties that challenges many students is divisibility. Read this article to review the divisibility rules and how the GMAT tests them .
Jeffrey Miller is the head GMAT instructor for Target Test Prep. Jeff has more than fourteen years of experience in the business of helping students with low GMAT scores hurdle the seemingly impossible and achieve the scores they need to get into the top 20 business school programs in the world, including HBS, Stanford, Wharton, and Columbia. Jeff has cultivated many successful business school graduates through his GMAT instruction, and will be a pivotal resource for many more to follow.
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The GMAT™ exam feels like a math test, especially GMAT Problem Solving problems. ... GMAT Problem Solving #3: Draw it out; Do arithmetic, not algebra; Choose smart numbers. Two oil cans, X and Y, are right circular cylinders, and the height and the radius of Y are each twice those of X. If the oil in can X, which is filled to capacity, sells ...
Our Free Practice Questions are designed to give you the thorough understanding of how to go about solving a problem that you crave. Our thorough explanations show you what to expect from each GMAT question, detailing question-specific hurdles and common traps. Thankfully, our practice questions provide a wide variety of question types spanning ...
GMAT Math Problem Solving. Problem solving questions are standard 5-choice multiple choice questions. How to approach problem solving questions. Practice your math problem solving skills with our 10 tests. You shouldn't need more than three lines of working for any problem. Redraw geometry figures on your scratch pad to include the information ...
The sample GMAT Problem Solving questions are often at the top of the article, although sometimes they are further down in the text. The total number of sample Problem Solving problems available from this page is far more than 37, the total number of math questions you will see on a full Quantitative section of the GMAT.
Problem Solving (PS) questions are typical multiple-choice math questions that you have probably encountered before. A math problem is presented, followed by five answer choices, one correct and four incorrect. Calculators are not allowed; calculations must be done manually on your whiteboard. Long, tedious arithmetic is rarely the best approach.
4. Study the wrong answers. Remember that the GMAT test-writers study the way that test-takers make mistakes. The GMAT test-writers use that knowledge to come up with wrong answers. In fact, they can increase the difficulty of a problem simply by including more wrong answers that are based on the common mistakes test-takers make when solving a ...
GMAT Problem Solving, Sample Question #2. A certain airline's fleet consisted of 60 type A planes at the beginning of 1980. At the end of each year, starting with 1980, the airline retired 3 of the type A planes and acquired 4 new type B planes. How many years did it take before the number of type A planes left in the airline's fleet was ...
Lesson 1: Problem solving. GMAT: Math 1. GMAT: Math 2. GMAT: Math 3. GMAT: Math 4. GMAT: Math 5. GMAT: Math 6. GMAT: Math 7. GMAT: Math 8. GMAT: Math 9. GMAT: Math 10. ... Let's go back to the GMAT problems. So problem 227. In the coordinate system above, which of the following is an equation of line l? And they didn't put this 2 here and this ...
The key to GMAT problem solving mastery, then, lies in mastering the fundamentals. Memorize the exponent rules. Memorize common roots and higher powers. Memorize the formulas for finding area of different shapes. Know how to find mean, median, mode, and standard deviation without blinking an eye.
When GMAT Problem Solving questions are created, they are designed to push people who always approach questions the same way. Business schools want creative, flexible problem solvers, not rote math machines! As an example: a hard 700+ level Problem Solving question on the exam will make you use fairly hard math (algebra, arithmetic, etc.) to go ...
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/test-prep/gmat/gmat-unit/problem-so...
GMAT Math : Problem-Solving Questions Study concepts, example questions & explanations for GMAT Math. Create An Account. All GMAT Math Resources . 22 Diagnostic Tests 693 Practice Tests Question of the Day Flashcards Learn by Concept. Example Questions.
Complete 1000 GMAT Problem Solving Series (PS-1000 Series) Questions. Important Topic. Bunuel. Sat Dec 03, 2022 1:23 pm . 97 . 9. 50,847. Last Post. by: Bunuel. ... Of the 200 math majors at a certain university, 30 percent w. 555-605 Level | Min-Max Problems +2 tags
The GMAT Quantitative Section is designed to test your quantitative reasoning—your ability to think logically about quant concepts. It covers basic math concepts, including arithmetic, algebra, statistics, and more but it's not truly a math test (though it can certainly feel like it). The section contains only one problem type: Problem Solving.
GMAT Problem Solving questions ask you to use your mathematical problem-solving skills to find the correct answer to a math problem, while Data Sufficiency questions ask you to analyze mathematical data presented in order to determine whether you have enough information to solve a problem, or what information is necessary to do so.
You have not answered any question so far. There are 50 free practice questions in our database in total, which you can answer and will improve your skills. You can answer all questions in a row (click on "All Questions") or only all questions of a particular section (click on that Section) or a single selected question (click on that Question).
UPDATED FOR THE NEW GMAT IN 2024. To master GMAT Problem Solving, you'll need to develop the following skills: A firm grasp of basic, high school math concepts. The ability to avoid careless errors. Good time management. A flexible and creative mindset. Although GMAT Problem Solving questions are rooted in fundamental, high school-level math ...
GMAT Problem Solving Tricks. GMAT problem solving questions are often thornier than they appear. Below are the best GMAT math trick, tips and shortcuts to help you strategically approach even the toughest problem solving questions. #1: Look at All the Answer Choices Before Solving
Simply put, the GMAT Quant section tests your ability to analyze data and draw conclusions using reasoning skills. There are two types of questions on the GMAT quant: data sufficiency and problem solving. The quant section tests your content and analytical knowledge of basic math concepts, such as arithmetic, algebra, and geometry.
The two types are problem solving questions and data sufficiency questions. Typically, about two-thirds of GMAT math questions will be problem solving and one-third will be data sufficiency. However, this proportion could change depending on how many experimental questions you get of each type. Problem solving questions are just like any other ...
Our GMAT Math Help provides example problems which are answered and fully explained, allowing you to walk through the process of solving a challenging question as guided practice. We organize our GMAT Math Help content in differing levels of specificity, so whether you want to see examples of sufficiency questions in general or questions ...
An Overview of the GMAT Quant Topics. Each Major GMAT Quant Topic Can Be Broken Down Into Subtopics. GMAT Problem-Solving Questions. Problem-Solving Example 1: Quadratic Equations. Problem-Solving Example 2: Number Properties. Problem-Solving Example 3: Exponents. Problem-Solving Example 4: General Word Problems.
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/test-prep/gmat/gmat-unit/problem-so...