Aptitude | Arithmetic Aptitude | Question 4

Which is not the prime number?
(A) 43
(B) 57
(C) 73
(D) 101

Answer: (B)
Explanation: A positive natural number is called prime number if nothing divides it except the number itself and 1. 57 is not a prime number as it is divisible by 3 and 19.
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