ISEE Word Problems Question 176: Answer and Explanation
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Question: 176
7. If x is an odd number, which of the following could be an even number?
- A. x + 2
- B. 2x + 1
- C. 2x – 3
- D. 3x + 3
Correct Answer: D
Explanation:
The answer is D
An odd number plus or minus an even number is an odd number. Two times an odd number is an even number. An even number plus or minus an odd number is an odd number. Three times an odd number is an odd number. An odd number plus or minus an odd number is an even number.
Plug in an odd number for x, such as x = 3. Only choice (D) yields an even number.