Multiple choice

Find the missing number in the given series: 8, 13, 10, 15, 12, ____

  1. 14

  2. 17

  3. 18

  4. 20
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B Correct answer
Explanation

The pattern is +5, -3, +5, -3, +5. 12 + 5 = 17.

AI explanation

The given series alternates using two interleaved patterns. The first pattern increases by 5 (8 + 5 = 13) and the second pattern also operates on the subsequent alternate terms. Following the subtract 3 alternating logic, 13 - 3 = 10, 15 - 3 = 12, and the next term is 12 + 5 = 17.

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