Multiple choice

Find the missing term in the following series. 7, 12, 25, 22, 43, ?

  1. 30

  2. 32

  3. 50

  4. 52

  5. 43
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B Correct answer
Explanation

The series is 7, 12, 25, 22, 43, ?. Alternating series: 7, 25, 43 (add 18) and 12, 22, ? (add 10). 22 + 10 = 32.

AI explanation

The series alternates between two separate patterns, where the first pattern starts at 7 and adds 5, then adds 13 to get 7, 12, 25, and so on. The second pattern starts at 12 and adds 10, then adds 11, but checking the options for a consistent pattern across odd positions reveals an increase by 18 then 18. Instead, evaluating the differences of the alternating even-positioned terms (12, 22) shows an increase of 10, leading to the next term of 32.

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