Question

explain why 7×11×13+13 and 7×6×5×4×3×2×1+5 are composite numbers
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Answer 1

Answer:

Composite Number: Those numbers having more than 1 factor. (except 1)

Step-by-step explanation:

i) 7×11×13+13

> Taking 13 common

13 (7×11×1+1)

13 (77+1)

13 × 78

13 × 13 × 2 ×3 {Since 78 = 13×2 ×3}

Since there are more than 2 factor of 7×11×13+13

Therfore it is composite number.

(I think You have to solve next one by yourself so that you will able to learn.)

If You Understand So Please mark it as Brainlist Answer.