All GRE Math Resources
Example Question #5 : Even / Odd Numbers
Assume and are both even whole numbers and .
What is a possible solution for ?
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 #1 : How To Subtract Even Numbers
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?
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 #7 : Even / Odd Numbers
Choose the answer below which best solves the following equation:
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, .