Question

Check whether 5*3*11+11 and 5*7+7*3+3 are composite numbers

Answer 1

Answer:

(5)(3)(11)+11

=(15)(11)+11

=165+11

=176

(5)(7)+(7)(3)+3

=35+(7)(3)+3

=35+21+3

=56+3

=59

176 is a composite no. but 59 is a prime no.

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