1.  Which one of the following numbers is completely divisible by 45?

A. 181560
B. 331145
C. 202860
D. 2033555
E. None of these

Answer: Option C

Explanation:

45 = 5 x 9, where 5 and 9 are co-primes.

Unit digit must be 0 or 5 and sum of digits must be divisible by 9.

Among given numbers, such number is 202860.