Multiple choice

Directions: Complete the series.

1, 3, 3, 6, 5, 9, 7, 12, ?

  1. 17

  2. 14

  3. 9

  4. 15

  5. 11
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The series is divided into two sub-series of odd places and even places like 1, 3, 5, 7. Digits on odd places are incremented by 2 successively to get the next digit at odd place. Numbers on even places (3, 6, 9, 12) are incremented by 3 successively to get the next number at even place. Similarly, we have to find the numbers at odd place which are incremented by 2.

So, 7 + 2 = 9

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