Question

Explain why 5 x 11 x 13+ 13 and 6 x 5 x 4x 3x 2 x 1+5 are composite numbers?​

Answer 1

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Given, 7 x 11 x 13 + 13

= 13 x (7 × 11 + 1) = 3 × 78

This number is multiple of two

integers.Hence it has more than two

factors.Hence it is a composite number.

similarly in

7 X 6x5x4x3 x2x1 + 5

= 5(7 x 6x4x3 x2x1+1) = 5 x 1009

This number is multiple of two

integers.Hence it has more than two

factors.Hence it is a composite number.

Answer 2

Step-by-step explanation:

5×11 = 55×13= 715 +13 =728

6×5= 30 ×4= 120×3=360 ×2=720+6= 726

answer