Multiple choice

Fill up the missing number in the following question according to the pattern in the series. 9, 12, 11, 14, 13, ------, 15.

  1. 14

  2. 16

  3. 18

  4. 20
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The series follows an alternating pattern: +3, -1, +3, -1. Starting from 9: 9+3=12, 12-1=11, 11+3=14, 14-1=13, 13+3=16, 16-1=15.

AI explanation

The given number series follows two alternating patterns of adding 3 and subtracting 1. The first pattern starts at 9 and adds 3 to get 12, while the second pattern starts at 12 and subtracts 1 to get 11. Continuing this alternating logic from the number 13, we add 3 to arrive at the missing number 16.

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