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29 Aug 2019, 06:32
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
66% (01:12) correct
34%
(01:12)
wrong
based on 47
sessions
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If k is an integer, is k even?
(1) k/2 is not an even integer.
(2) 5 - k is an even integer.
(1) k/2 is not an even integer.
(2) 5 - k is an even integer.
29 Aug 2019, 07:05
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29 Aug 2019, 07:25
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IMO B
Statement 1, if k = 4, k/2=2. If k= 6, k/2= 3. Both cases k is even. Not sufficient.
Statement 2, 5-k= even, odd-odd=even, hence we know k is odd. Sufficient.
Statement 1, if k = 4, k/2=2. If k= 6, k/2= 3. Both cases k is even. Not sufficient.
Statement 2, 5-k= even, odd-odd=even, hence we know k is odd. Sufficient.
