Question

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 + 1)

Since it has 13 as a common factor. Therefore 7×11×13+13 is composite no.

Similarly

7×6×5×4×3×2×1+5

5(7× 6 × 4 × 1 + 1)

It has a 5 as a common factor. Therefore it is composite number

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