If n is an odd integer greater than 1, is n prime?
1) n is a factor of 56
2)14 is a factor of 2n
1) n is a factor of 56
2)14 is a factor of 2n
The powers of two are bloody impolite!!
Statement 1:
n is a factor of 56
the factor of 56 are 2 x 2 x 2 x 7
the only odd factor is 7 which is odd...
therefore A is sufficient
Statement 2:
14 is a factor of 2n
i.e 2n/14 = k ( an integer)
or n/7 = k
or n= 7k
so n is a multiple of 7 and not necessarily a prime....
only when k =1, it is prime...
when k= 2, it is not prime...
so, statement two give multiple values of k which may or may not be prime...
hence its insufficient
So, the answer is A...
OA please?
