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Think You Know Your Prime Factors?
Here is a good problem to test your understanding of prime factors, not to add multiples. See if you can finish the problem in less than 2 minutes. If P is the product of all of the positive multiples...
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It’s Not An Excited Number; It’s a Factorial!
If you’ve ever come across a number with an exclamation mark in front of it, that’s the factorial sign, e.g. 5!. Factorials don’t come up too often on the GRE, and when they do, it’s usually on harder...
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Integers and Mental Math
What better way to spend the weekend than with your favorite friends: integers? Okay, maybe integers aren’t your best friends. But trust me, they are much better company than irrational numbers. Below...
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GRE Math: Divisibility Rules
1. Which of the following is NOT divisible by 3? (A) 231 (B) 246 (C) 285 (D) 326 (E) 411 One way to do this problem is to divide each answer choice by 3 and see which one leaves a remainder. A far...
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GRE Math – Essential Tips For Factoring
Let’s say you have a large number, and you need to break it down into its prime factors (prime factors are prime numbers, e.g. 2, 3, 5, 7). When dealing with small numbers, such as 24 (2 x 2 x 2 x 3),...
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GRE Math Video Lessons: Series and Counting Basics
A relatively popular concept on the GRE math is series – when you have a list of numbers that follow a certain pattern(e.g. consecutive numbers). Usually, the question will ask you to add up all the...
View ArticleGRE Math: Absolute Values
On average you will see at least one question on the Revised GRE dealing with absolute values. You may even see a few. Yet, absolute value gets lost in the prep fray amongst the more popular concepts....
View ArticleStudent Question on ETS Material: Graphs of Absolute Value Functions
Here’s a question that one of our students sent in– ask and you shall receive! 🙂 “Hello team Magoosh. First I’d like to say I love this site, I’ve learned so much! I’m posting a question about a...
View ArticleProportions on the GRE
Proportions are extremely common on the GRE. If you don’t have a strong grasp of them, and you are busy trying to figure out combinations/permutations or probability, stop. Focus your attention on...
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