Question

Without actual division check whether 123015 is divisible by 15

Answer 1

There is no 1 single rule for divisibility by 15, but every number that is divisible by 15 must be divisible by the factors of 15, namely 3 and 5 ...To be divisible by 15 a number should be divisible by 3 and 5. So 123015 is divisible by both 3 and 5 so it is divisible by 15 also.