Which of The Following is Not a Prime Number?

  1. 51
  2. 31
  3. 41
  4. 61
Monis Rasool Professor Asked on 7th September 2015 in Maths.
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1 Answer(s)

Answer: (1) 51 

Explanation:-
51 is not a prime number because it is divisible by 3 & 17 but rest are the prime number. They are not divisible by any number.

Hence, the answer is (1) 51.

Anurag Mishra Professor Answered on 10th September 2015.
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