Question

explain why 7×11×13+13 and 7×6×5×4×3×2+5 are composit number?​

Answer 1

Step-by-step explanation:

7*11*13+13

=13(7*11+1)

=13*(77+1)

=13*78

=13*13*3*2

since, it is more than two factors (13,3,13,2,1,78=1014) so it is composite number

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

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

=5(1008+1)

=5(1009)

since since it has more than two factor (5,1009,1,5*1009=5045)

so it is composite number