Question

If a number is divided by 15 then it must be divided by…​

Answer 1

Answer:

as we know

5×3 makes 15

therefore is a number is divisible by 15

then it must be divisible by both 3 and 5

as we use this way to find numbers divisible by 15

an example is 45

4+5 makes 9

9 is in the table of 3, therefore it's divisible by 3

45 ends with 5,then it's divisible by 5 as when a number ends with 5 or 0, it's surely divisible by 5

Unless a zero,it is.

hope it helps