Railways PYQCBT 2 2017

RRB NTPC · Question 118

What will be the next number in the series? 25, 62, 123, 214, ?

  1. 341

  2. 317

  3. 334

  4. 292

Show answer & explanation

Answer: (A) 341

Explanation

Each term is n³ − 2: 3³ − 2 = 25, 4³ − 2 = 62, 5³ − 2 = 123, 6³ − 2 = 214. Next: 7³ − 2 = 341.