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## GRE Quant: The Difference of Squares

If you’ve been studying GRE for some time, you’ve very likely encountered the following: . You may, however, only seen the following equation in the context of algebra. Nevertheless, the formula above applies to number properties. Let’s take a look. While you may be tempted to make a mad dash at it, calculating each of [...]

## GRE Exponents: Practice Question Set

Each of the math questions below is directly inspired by a question in the on-line Revised GRE test. I’ve provided an easier version of the question (#1) and a more difficult version of the question (#2). My recommendation is to try the easier version first. Then, if you answer it correctly, click on the link, [...]

## GRE Math Basics: Quick Tips

Prime numbers 2 is the smallest prime number 2 is the only prime even number 1 is not a prime 3, 5, 7 are the only odd consecutive sequence of three integers   Digits In the integer 5,432, 5 is the thousands digit, 4 is the hundreds digit, 3 is the tens digit, and 2 [...]

## GRE Math Multiple Choice Practice Question of the Week #23

This week’s practice question is a regular multiple choice problem, so there’s only one right answer– good luck! We’ll be posting the answer tomorrow.   Which of the following equations is true for all positive values of x and y?   Update: Here’s the answer/explanation post!

## GRE Math Video Lessons: Exponents

Exponents are troublesome; fortunately, they do not need to be. What I plan to do in this series is show you the basics, so that you can move confidently through the intermediate level, and even the advanced level. I’ve created three lessons, corresponding to basic, medium, and advanced. Once you have a sense of how the [...]

## Numeric Entry Practice Question of the Week #21 Answer

Here are the answer and explanation to yesterday’s practice question.  Thanks for submitting your answers!     Video Explanation:

## Numeric Entry Practice Question of the Week #21

This week’s practice question is Numeric Entry, so no answer choices are given! You’ll have to type the number in to submit your answer. Good luck, we’ll be posting the answer and explanation tomorrow! If , what is the value of n?   Update: Here’s the answer/explanation post!

## Math Basics: Exponents

One thing is certain on test day – you will see exponents. Another thing is also certain – those exponent problems will be meant to trick you. So, know your exponent properties, but also be aware that knowing the fundamentals alone won’t guarantee success. Tread carefully, and check your work. You should be able to answer most [...]

## GRE Math Basics – Exponents

The Dreaded Exponent Exponents have long been the bane of many students. And that should come as no surprise—after all, there are negative exponents, fractions as exponents, and the terrible sounding exponents of exponents. Feeling comfortable with exponents in all their various (and nefarious) guises will definitely help you test day. But, for right now, [...]

## Exasperating Exponents

(A) (B) (C) + (D) – 2 (E) – 2 In this problem many students are tempted to simply add the exponents together and choose answer choice (B). , however, is not the answer. Were we multiplying the 2 together then we would add the exponents. The general rule is: if the bases are the [...]