Question

Explain why 3× 5 × 7+7 is a composite number. ANS)7×

Answer 1

Answer:

112 is not a prime number because it is divisible by many numbers including a prime number itself.

112 is divisible by, 2, 4, 56, etc.

Step-by-step explanation:

3 x 5 x 7 + 7

= 15 x 7 + 7

= 105 + 7

= 112

Numbers which are not divisible by any natural numbers are known as prime numbers. For example, 2, 3, 5, etc.

Also, all numbers which are even, except two, are composite numbers. Thus, 112 is not a prime number.