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15 Jan 2018, 05:55
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
79% (01:45) correct
21%
(01:58)
wrong
based on 106
sessions
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If x is an integer, and k = (x – 1)(x + 2) – (x – 1)(x – 2), then which of the following must be true?
(A) k is odd only when x is odd.
(B) k is odd only when x is even.
(C) k is even only when x is even.
(D) k is even only when x is odd.
(E) None of the above.
(A) k is odd only when x is odd.
(B) k is odd only when x is even.
(C) k is even only when x is even.
(D) k is even only when x is odd.
(E) None of the above.
15 Jan 2018, 06:03
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It can be simplified to: (x-1)((x+2)-(x-2)
(X-1)(4)
So whatever the case 'K' will be even
So E
Sent from my ONEPLUS A3003 using GMAT Club Forum mobile app
(X-1)(4)
So whatever the case 'K' will be even
So E
Sent from my ONEPLUS A3003 using GMAT Club Forum mobile app
15 Jan 2018, 06:09
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