Question

Explain why 7*11*13+13 and 7*6*5*4*3*2*1+5 are composite numbers....

Answer 1

Step-by-step explanation:

7*11*13+13

It can be written as: 13(7*11+1)

Since composite numbers has more than two prime factors. Hence it is a composite number.

7*6*5*4*3*2*1+5

It can be written as: 5(7*6*4*3*2*1+1)

Since composite numbers has more than two prime factors. Hence it is a composite number.

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Answer 2

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