Question

22. Explain why 7 x 11 x 13 + 13 and 7x 6 x 5 x 4 x 3 x2x1+5 are composite numbers.​

Answer 1

Answer:

• 7×11×13+13=13(7×11×1+1) =13×(77+1)=13×78
• 7×6×5×4×3×2×1+5=5×(7×6×4×3×2+1)=5×(168×6+1)=5×(1008+1)=5×1009

Both have more than two factors so both are composite number.

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Answer 2

Answer:

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