1.  What will be remainder when 17200 is divided by 18 ?
A. 17
B. 16
C. 1
D. 2

Answer: Option C

Explanation:

When n is even. (xn - an) is completely divisible by (x + a)

 (17200 - 1200) is completely divisible by (17 + 1), i.e., 18.

 (17200 - 1) is completely divisible by 18.

 On dividing 17200 by 18, we get 1 as remainder.