GRE Math : How to subtract even numbers

Study concepts, example questions & explanations for GRE Math

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Example Questions

Example Question #1 : Even / Odd Numbers

Assume  and  are both even whole numbers and .

What is a possible solution for ?

Possible Answers:

Correct answer:

Explanation:

Since  must result in a positive whole number. The only answer that fits these requirements of being both positive and whole number is .

Example Question #83 : Integers

A bus has sixteen passengers at its first stop.  It drops off three at the second stop, and three at the third stop.  At the fourth stop, eveyone else gets off the bus.  How many people got off at the fourth stop?

Possible Answers:

Correct answer:

Explanation:

First, add the total number of passengers that got off BEFORE the fourth stop.  Three plus three is six, so you know that you've lost six total passengers before the fourth stop.  , so there are ten passengers remaining at the fourth stop, and that's how many get off there. 

Example Question #84 : Integers

Choose the answer below which best solves the following equation:

Possible Answers:

Correct answer:

Explanation:

If it's simpler for you, you can split this problem into two parts:  First, take  away from , and you're left with .  Then, take away  from  (you can even count backwards if necessary), and you'll be left with the final answer, .

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