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27 Jan 2020, 02:49
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
76% (01:00) correct
24%
(01:20)
wrong
based on 54
sessions
History
Date
Time
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Not Attempted Yet
If z is a positive integer, does z have more than 2 positive integer factors?
(1) 23 < z < 29
(2) z is odd.
(1) 23 < z < 29
(2) z is odd.
27 Jan 2020, 05:36
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The question is just asking if z is not prime, and there are no primes strictly between 23 and 29, so Statement 1 is sufficient. Statement 2 is not, since some odd numbers are prime and some are non-prime, so the answer is A.
27 Jan 2020, 05:40
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If z is a positive integer, does z have more than 2 positive integer factors?:
the question can be reduced to " is z a prime number "?
1)23 < z < 29
z can be 24, 25, 26, 27, 28
as none of these possible values of z is prime, we can definitely answer that z is not a prime number .
SUFFICIENT
2) z is odd: z can be any odd number : 3 or 9. hence it is NOT SUFFICIENT to answer whether z a prime number.
the question can be reduced to " is z a prime number "?
1)23 < z < 29
z can be 24, 25, 26, 27, 28
as none of these possible values of z is prime, we can definitely answer that z is not a prime number .
SUFFICIENT
2) z is odd: z can be any odd number : 3 or 9. hence it is NOT SUFFICIENT to answer whether z a prime number.
Answer = A
Bunuel
