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30 Jul 2017, 22:46
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A
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Difficulty:
55%
(hard)
Question Stats:
60% (02:01) correct
40%
(02:02)
wrong
based on 82
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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.
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
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
