Q.22- Explain (3 x 5 x 7) + 7 is a composite number.
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Explanation:
A number that is divisible by at least 3 no.s is called a composite no.
(3 x 5 x 7) + 7
=(15 x 7) + 7
=105 + 7
=112
112 is a composite no. because it is divisible by 1, 2,4,7,8,14,16,56 and 112
For this reason(3 x 5 x 7) + 7 is a composite no.
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