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02 Jan 2018, 11:29
Kudos
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B
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Difficulty:
65%
(hard)
Question Stats:
46% (01:23) correct
54%
(01:11)
wrong
based on 133
sessions
History
Date
Time
Result
Not Attempted Yet
If N > 0, is N a whole number?
(1) 3 × N is an odd number.
(2) 2 × N is an even number.
(1) 3 × N is an odd number.
(2) 2 × N is an even number.
02 Jan 2018, 11:34
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If N > 0, is N a whole number?
(1) 3 × N is an odd number --> 3n = odd --> n = odd/3 --> odd/3 could be an integer, as well as non-integer. For example, consider 3/3 and 5/3. No sufficient.
(2) 2 × N is an even number --> 2n = even --> n = even/2 = integer. Sufficient.
Answer: B.
(1) 3 × N is an odd number --> 3n = odd --> n = odd/3 --> odd/3 could be an integer, as well as non-integer. For example, consider 3/3 and 5/3. No sufficient.
(2) 2 × N is an even number --> 2n = even --> n = even/2 = integer. Sufficient.
Answer: B.
24 Aug 2025, 06:26
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