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GRE Sample Test 5 Quantitative Reasoning 2
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© examsnet.com
Question : 11
Total: 20
If a, b, and c are integers such that 3a + 4bc is even, then which of the following CANNOT be true?
b is odd
bc is odd
ab is even
ac is odd
a + c is even
Validate
Solution:
To yield an even sum, the terms being added must both be odd or both be even.
Since 4bc has a factor of 4, it must be even. Therefore, 3a must be even. For 3a to be even, a must be even. If a is even, then it is not possible for ac to be odd.
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