numbest or a – InterviewSolution

1.

numbest or a

Answer»

To show :7 × 11 × 13 + 7 is composite numberProof:

7×11×13+7=7(11×13+1)=7(143+1)=7×144=7 × 2×2×2×2×3×3=7 × 2⁴ × 3²

It is the product of prime factors 7, 2 and 3.

Hence, it is a composite numberLike if you find it useful

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