RRB NTPC · Question 43
What will be the next number in the following series? 1, 2, 9, 28, 65, ________
Show answer & explanation
Answer: (B) 126
Explanation
Each term is n³ + 1: 0 + 1, 1 + 1, 8 + 1, 27 + 1, 64 + 1. Next: 125 + 1 = 126.
Railways PYQCBT 2 2017