Multiple choice

Find the missing term in the following series: 25, 27, 24, 26, 23, 25, ?

  1. 27

  2. 26

  3. 22

  4. 23

  5. 24
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C Correct answer
Explanation

The series alternates: +2, -3, +2, -3, +2, -3. 25+2=27, 27-3=24, 24+2=26, 26-3=23, 23+2=25, 25-3=22.

AI explanation

The series follows two alternating patterns operating on every other term. The first pattern subtracts 1 from the previous term, giving 25, 24, 23, and so on. The second pattern also subtracts 1 from its previous term, giving 27, 26, 25. Continuing the first pattern after 23, the next term is 23 - 1 = 22.

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