Multiple choice

Directions: Find the missing term in the following number series. 9, 12, 10, ?, 12, 21, 15, 27

  1. 12

  2. 16

  3. 18

  4. 20

  5. None of these
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B Correct answer
AI explanation

The series is composed of two alternating sequences: 9, 10, 12, 15 and 12, 16, 21, 27. In the first sequence, the differences are 1, 2, and 3, establishing a steady increase. In the second sequence, the differences are 4, 5, and 6, so the missing term is 12 + 4, which equals 16.

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