Question

explain why 7×11× 13 + 13 is composite number

Answer 1

13(7×11×1+1)

Therefore, this can be divided by 13 as 13 is a factor.

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Answer 2

We have,7×11×13+13=1001+13=1014.

Now,1014=2×3×13×13.

Thus,it is the product of prime factors.

Hence,7×11×13+13 is a composite number.