Question

Explain why 15 x 7 +7 is a composite number.

Answer 1

Answer:

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Answer 2

15 x 7 + 7

= 7(15 x 1 + 1)

= 7(15 + 1)

= 7 x 16

= 7 x 2²

so this no. is the product of primes.

therefore it is a composite number.