Question

explain why 7*11*13+13 and 7*6*5*4*3*2*1+5 are coposite numbers​

Answer 1

7*11*13+13

13(7*11*1+1)

13(78)

The given number have more than two factors so it is a composite number.

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

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

5(1009)

The given number have more than two factors so it is composite number.