Bunuel wrote:
If z is a positive integer, does z have more than 2 positive integer factors?
(1) 23 < z < 29
(2) z is odd.
CONCEPT: Prime Numbers have exactly 2 distinct factors. FIrst factor being 1 and the second factor being the number itself
Any positive integer other than prime numbers and 1 have greater than 2 factorsQuestion: does z have more than 2 positive integer factors?Question REPHRASED: Is z a Prime Number?Statement 1: 23 < z < 29i.e. z = {24, 25, 26, 27, 28} (because z is integer)
Not none of the possible values of z is a Prime number i,e, answer to teh question is is DEFINITELY NO hence
SUFFICIENT
Statement 2: z is oddi.e. z may be 3 (prime) or 15 (non-prime) hence
NOT SUFFICIENT
Answer: Option A
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