Explainbwhy 3×5×7+7is composite number

1.	Explainbwhy 3×5×7+7is composite number
Answer» We have, (3\xa0× 5\xa0× 7) + 7 = 105 + 7 = 112Prime factors of 112 = 2\xa0× 2\xa0× 2\xa0× 2\xa0× 7 = 24\xa0{tex} \\times {/tex}\xa07So, it is the product of prime factors 2 and 7, i.e. it has factors other than 1 and itself. Hence, it is a composite number.

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