Question

explain why 15*7+7 is a composite number

Answer 1

Acomposite number is a whole number that can be divided evenly by numbers other than 1 or itself.
15*7+7= 112 , and 112 can be divided by 2, 4, 8, etc. So, it is a composite no.

Answer 2

Answer:

The given number is a composite number.

Step-by-step explanation:

A number is a composite number if it is multiple of two integer and it has at least one divisor other than 1 and itself.

The given number is

$15\times 7+7$

Take out the common factor.

$7(15+1)$

$7(16)$

This number is divisible by 2,4,7, 8 and 16.

Therefore the given number is a composite number.