Show that the number is a composite number.

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Solution

Q.
Show that the number $5 \times 11 \times 17 + 3 \times 11$ is a composite number.

Ans.
$(5 \times 11 \times 17) + (3 \times 11)$

$= (85 \times 11) + (3 \times 11)$

$= 11 \times (85 + 3) = 11 \times 88$

It clearly shows that it has more than two factors. Hence it is a composite number

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