explain why 3*5*7+7*11 is a composite number
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explain why 3*5*7+7*11 is a composite number
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7(3*5*1+1*11)
7(165+1)
7(166)
Now factorise 166.......
So, 7(2*83)
Which is a prime no.
So, 3*5*7+7*11 is a composite no.