Question

explain why 7 into 11 into 13 + 13 and 7 into 6 into 5 into 4 into 3 into 2 into 1 + 5 are composite number​

Answer 1

1.7×11×13+13

=13(7×11×1+1)

=13(78)

2. 7×6×5×4×3×2×1+5

=5(7×6×4×3×2×1+1)

=5(1008+1)

=5×1009

Clearly, it shows that the given numbers have more than two factors . Hence it is a composite number.

Answer 2

hope it will help u...