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Railways PYQCBT 2 2017

RRB NTPC · Question 97

Find the missing number (?) in the following series. 1, 1.5, 2.5, 4, ?, 8.5, 11.5, ........

  1. 6

  2. 5

  3. 4.5

  4. 5.5

Show answer & explanation

Answer: (A) 6

Explanation

The differences are 0.5, 1, 1.5, 2, 2.5, 3. So the missing term = 4 + 2 = 6 (then 6 + 2.5 = 8.5 and 8.5 + 3 = 11.5).