1.

2*(3*(4*(5*(6*(13*(text*(7*(a*(d*n))))))))) %2B 13*(7*11)

Answer»

A composite number has more than 2 factors .Only composite numbers can be expressed in the form of product of two numbers other than 1 and itself .

= 7*11*13+13

= 13 * ( 7 * 11 + 1 )

= 1 * 13 * ( 7*11 + 1 )

7*11*13+13can be expressed as product of other numbers

Therefore , 7*11*13+13 is a composite number



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