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  • Explain why 3 × 5 × 7 + 7 is a composite number

Explain why 3 \times 5 \times 7 + 7 is a composite number

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Composite number – the number which is divisible by a number other than one and itself.  Here, 3 x 5 x 7 + 7 = 112 and 112 is divisible by 2, 4, 7, 8, 14, 16, 28 and 56. Hence it is a composite number.

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