The value 7 divides into 36 a total of 5 times, with a remainder of 1. Let’s double-check our thinking with a particular value, say n=36. The clue is that 21 is a multiple of 7, so when n+21 is divided by 7, the additional 21 will not contribute anything to the remainder. Also, check out these GRE Math Basics Quick Tips!Įxplanation: Quantitative comparison questions on the GRE ask you to decide whether one quantity is bigger than the other, the same, or cannot be determined. Check out this video on Number Sense and practice mental math with these problems. Try to avoid mindless calculator use by developing a good number sense and an aptitude for mental math. What about choice (E)? Isn’t that divisible by both 12 and 27? Well yes, it’s a common multiple, but it’s not the least common multiple. The LCM is 2 2×3 3 = 4×27 = 108.īy the way, you could eliminate answer choices (A), (B), and (C), because each one fails to be divisible by one of the two numbers, 12 or 27. If an integer is divisible by both 12 and 27, then it must have at least two factors of 2 and three factors of 3. First, get the prime factorizations of each number. You should also familiarize yourself with concepts such as prime factorizations of whole numbers, least common multiple (LCM), and greatest common factor (GCF) in the math section of the GRE.Įxample (MC): If an integer is divisible by both 12 and 27, then the integer must be divisible by which of the following?Įxplanation: This question is really asking for the LCM of 12 and 27. Watch our video to brush up on Divisibility Rules. There are infinitely many of those too! Primes are important because they are like the “Lego pieces” that fit together to make up all the other numbers out there. Numbers like 2, 3, 5, 7, 11, 13, 17, and 19, that are only divisible by 1 and themselves, are called the primes. (Of course, there are infinitely many more multiples-just imagine continuing each column or row forever!) are multiples of 3, or equivalently, those numbers are divisible by 3. For example, the numbers 3, 6, 9, 12, 15, etc. If you want to learn more about the question types on the GRE test, check out What Kind of Math is on the GRE? Table of ContentsĮach column or row displays the first ten multiples a given number. Each example will be tagged as QC (quantitative comparison), MC (multiple choice), or NE (numeric entry). We’ll also work through a few GRE arithmetic practice questions. In this post, we’ll explore the various GRE arithmetic topics, which include things like divisibility, remainders, exponents, roots, percents, ratios, and sequences of numbers. It covers a lot of ground, including general properties of numbers and how they are put together. But don’t let the name fool you! Arithmetic means much more than just adding and subtracting numbers. The GRE Quantitative test has four main mathematical areas: Arithmetic, Algebra, Geometry, and Data Analysis. But often, students struggle with the GRE math section. (A) 18.5 (B) 18.75 (C) 19 (D) 19.5 (E) 19.By Shaun Ault on Octoin GRE Arithmetic, GRE MathĪchieving a high score on the GRE (Graduate Record Examination) is one of the major steps in landing a spot in the graduate school of your choice. What is the median number of visitors for the week ? It is given 30% off, so we pay 70% of the original costĪ museum records 16 visitors to an exhibit on Monday, 21 on Tuesday, 20 on Wednesday, 17 on Thursday, 19 on Friday, 21 on Saturday, and 17 on Sunday. If he pays $35, what was the original price ? Zim buys a calculator that is marked 30% off. Total number of hours he works per week = 3(4.5) How much is his weekly pay (rounded to the next highest cent ?) Jon works 4.5 hours a day, 3 day each week after school. To find questions from 1 to 7, please visit the page "Math Practice Worksheets For SAT in Arithmetic"
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