Question

Find the least number of 5 digits, which is exactly divisible by 321.​

Answer 1

The answer is 10080.

First of all check that if any number is divisible by 6, then it is divisible by 2 and 3 as 2 and 3 are factors of 3. So, the question reduces to smallest number of 5 digit which is exactly divisible by 4,5,6,7.