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GMAT Even and Odd Numbers

by ejkiv


July 17, 2015


While it may seem like evens and odds are a pretty basic concept of math, the truth of the matter is the GMAT test writers have found some crafty ways to test this concept.  While some of the questions are rather simple, some of the most difficult questions on the exam can contain this concept.

As for the basics, even integers are divisible by 2 and odd integers are not.  Some examples:

Even:

0, 2, 4, 8, 20, 30, 112, 334, -2, -4, -8, -20, -30 , -112, -334

Odd:

1, 3, 5, 9, 21, 31, 113, 335, -1, -3, -5, -9, -21, -31 , -113, -335

Important notes are that positive and negative integers are included and 0 is an even integer; however, 0 is neither positive or negative.

Here are the basic properties for adding, subtracting, multiplying and dividing even and odd integers:

Even and Odd Numbers
*These do not have to be integers
** odd / even will not give you an integer

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