Question

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

Answer 1

Answer:

7×11×13+13 = 13(7×11+1) = 13×78

and 7×6×5×4×3×2×1+5 = 5×(7×6×4×3×2+1)

as the following no.s are multiples of more than 2numbers , so these numbers are composite numbers .

Answer 2

Answer:

7x11x13 + 13 = 13 ( 7x11 + 1 ) = 13x78 and 7x6x5x4x3x2x1 + 5 = 5x17x6x4x3x2 + 1 ) as the following no.s are multiples of more than 2numbers , so these numbers are composite numbers