Two prime numbers A,B(A<B) are called twin primes if they differ by 2 (e.g. 11,13,or 41,43....)If A and B are twin primes with B>23, then which of the following numbers would always divide A+B?

12

8

24

None of these

Correct Answer : A

The remainder when 7^{84} is divided by 342 is

If X is an odd integer, which of the following must be odd?

1. 2x + x II. x + x + x III. x * x * x

The difference between the greatest number and the smallest number of 6 digits using all but