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Railways PYQCBT 2 2017

RRB NTPC · Question 31

_______, 9, 25, 49, 121, 169

  1. 1

  2. 3

  3. 2

  4. 4

Show answer & explanation

Answer: (D) 4

Explanation

The terms are squares of consecutive primes: 2² = 4, 3² = 9, 5² = 25, 7² = 49, 11² = 121, 13² = 169.