Question

If a number is divisible by 3,then it is also divisible by 15.

Answer 1

False

Explanation:

False.

For a number to be divisible by 3, it must have at least one factor of 3.

For a number to be divisible by 15, it must have at least one factor of 3 and one factor of 5.

A number that is divisible by 15 is always divisible by 3, but a number divisible by 3 is not necessarily divisible by 15.

Look at the following examples of numbers that are divisible by 3 but not by 15:

3, 9, 12, 24