Question

Explain why 7×11×13+13 are composite.​

Answer 1

Step-by-step explanation:

$Given 7×11×13+13</p><p></p><p></p><p>=13×(7×11+1)=3×78 </p><p></p><p></p><p>This number is multiple of two integers.Hence it has more than two factors.Hence it is a composite number.</p><p></p><p></p><p>similarly in</p><p></p><p></p><p>7×6×5×4×3 ×2×1+5   </p><p></p><p></p><p>=5(7×6×4×3 ×2×1+1)=5×1009   </p><p></p><p></p><p>This number is multiple of two integers.Hence it has more than two factors.Hence it is a composite number</p><p></p><p>$

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