Explain why 3× 5 × 7+7 is a composite number.
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hence we can say that it is a composite number
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Answer:
(3× 5×7)+(7)
= 7(3×5×1+1) {taking 7 common term)
=7(15+1)
=7×16=112
here 7×16 which is 112 is a composite number because it has atleast two factors 7 and 16 other than 1 and the number itself
hence 112 or 3× 5 × 7+7 is a composite number.
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