rencsee wrote:
Is 3a + 2b + 5c even if 0<a<b<c and a, b and c are integers?
(1) 9a+7c is not even
(2) \(a^3*(c-1)^2\) is odd
Question: Is 3a + 2b + 5c even ?Since 2a is a multiple of 2 so irrespective of integer value of a, 2a will always be even so now the question remains
Question: Is 3a + 5c even ?Which will be even if either both a and c are even or both a and c are odd so the question becomes
Question REPHRASED: Are a and c both even or both odd ?Statement 1: 9a+7c is not evenwhich is true only if one of a and c is even and other is Odd hence
SUFFICIENT
Statement 2: \(a^3*(c-1)^2\) is oddwhich again mean that a is Odd and c is Even hence
SUFFICIENT
Answer: Option D
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