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Which of the following pair is not a prime number?1. 161, 1632. 101, 1033. 191, 1934. 41, 43

Answer» Correct Answer - Option 1 : 161, 163

The logic followed here is:

  • 161, 163 → 161 is divisible by 7. (7 × 23 = 161)
  • 101, 103 → 101, and 103 are prime numbers.
  • 191, 193 → 191, and 193 are prime numbers.
  • 41, 43 → 41, and 43 are prime numbers.

Hence, '161, 163' is the correct answer.


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