Railways PYQCBT 2 2017

RRB NTPC · Question 13

Select the number which is different from the other numbers given below : 157, 571, 599, 387

  1. 571

  2. 157

  3. 599

  4. 387

Show answer & explanation

Answer: (D) 387

Explanation

157, 571 and 599 are prime numbers. 387 = 3 × 3 × 43 is not prime, so it is the odd one.