explain why 7×11×13+13 and 7×6×5×4×3×2×1+5 are composite number explain
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Answered by
5
Explanation:
First
= 7×11×13+13
= 13 (7×11+1)
= 13 (77+1)
= 13×78
= 13×2×3×13
= 13×13×3×2
It cannot be factorised in prime numbers. It is a composite number.
Second
= 7×6×5×4×3×2×1+5
= 5 (7×6×5×4×3×2×1+1)
= 5×1009
It cannot be factorised in prime numbers. It is a composite number.
Hence, these both are composite numbers.
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Answer:
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Answer:
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