Question

(20) Explain why 7 x 11 x 13+13 and 7 x 6 x 5 x 4 x 3 x 2 x 1+5 are composite numbers​

Answer 1

Answer:

Step-by-step explanation:

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Answer 2

Answer:

We have,

7×11×13+13

=13(7×11×1+1)

=13×78

=13×3×2×13

Hence, it is a composite number .

We have,

7×6×5×4×3×2×1+5

=5(7×6×4×3×2×1+1)

=5(1008+1)

=5×1009

Hence, it is a composite number .