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Example Questions
Example Question #1 : How To Add Even Numbers
If x represents an even integer, which of the following expressions represents an odd integer?
Possible Answers:
3x + 1
x + 2
3x – 2
2x – 2
5x + 4
Correct answer:
3x + 1
Explanation:
Pick any even integer (2, 4, 6, etc.) to represent x. The only value that is odd is 3x + 1. Any number multiplied by an even integer will be even. When an even number is added and subtracted to that product, the result will be even as well. 3x + 1 is the only choice that adds an odd number to the product.
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