Explain why 7×11×13+13and7×6×5×4×3×2×1+5are composite number
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5
1001+13 and 4840+5=> 1013and 4845
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Answered by
3
(7 × 13 × 11) + 11 = 11 × (7 × 13 + 1)
= 11 × (91 + 1)
= 11 × 92
= 11 × 2 × 2 × 23
(7 × 6 × 5 × 4 × 3 × 2 × 1) + 3
3(7 × 6 × 5 × 4 × 2 × 1 + 1)
= 3 × (1681)
= 3 × 41 × 41
Given numbers have more than two prime factors.
Hence both number are composite
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