Find the sum of all three-digit numbers divisible by 9.

How many three-digit numbers are divisible by 5?

Consider a 6-digit number of the form XYXYXY. The number is divisible by :

The number 97^30 - 14^30 is divisible by:

The greatest number of four digit which is divisible by 15, 25, 40 and 75 is :

A 6-digit number has digits as consecutive natural numbers. The number is always divisible by