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If x and y are positive integers, is the number (x^2 + 3x + y^2) even?
(1) (4x + 3y) is even.
(2) (x − y) is even.
(1) (4x + 3y) is even.
(2) (x − y) is even.
31 Jul 2017, 00:32
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Is it A?
4x + 3y is even, therefore y has to be even since e+e = e. - sufficient as we know y is even, therefore even if X is odd the total will be even.
(X-Y) is even - insufficient. Because we don't know if both are odd or both are even.
Answer - A
Please tell me if correct
Sent from my Redmi Note 4 using GMAT Club Forum mobile app
4x + 3y is even, therefore y has to be even since e+e = e. - sufficient as we know y is even, therefore even if X is odd the total will be even.
(X-Y) is even - insufficient. Because we don't know if both are odd or both are even.
Answer - A
Please tell me if correct
Sent from my Redmi Note 4 using GMAT Club Forum mobile app
31 Jul 2017, 09:51
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stat 1 : we can dedeuce that is even,,,
analyzing the given expression,,, no matter what the value of x is ,,the expression will be even
ans A
analyzing the given expression,,, no matter what the value of x is ,,the expression will be even
ans A
