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If a, b, and c are integers such that 3a + 4bc is even, then which
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10 Apr 2024, 00:54
10 Apr 2024, 00:54
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If a, b, and c are integers such that 3a + 4bc is even, then which of the following CANNOT be true?
A. b is odd'
B. bc is odd
C. ab is even
D. ac is odd
E. a+c is even
A. b is odd'
B. bc is odd
C. ab is even
D. ac is odd
E. a+c is even
Re: If a, b, and c are integers such that 3a + 4bc is even, then which
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11 Apr 2024, 13:54
11 Apr 2024, 13:54
1
We get an even number when we add odd + odd or even + even
4bc is always even because there is a 4 there - an even number always makes the product even
so 3a must be even too. For it to be even, a must be even.
If a is even, then the product of a and c will always be even.
Answer: D
4bc is always even because there is a 4 there - an even number always makes the product even
so 3a must be even too. For it to be even, a must be even.
If a is even, then the product of a and c will always be even.
Answer: D
gmatclubot
Re: If a, b, and c are integers such that 3a + 4bc is even, then which [#permalink]
11 Apr 2024, 13:54
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