Multiple choice

Directions: In the question there is a number series with one term missing shown by question mark (?). This term is one of the alternatives among the four numbers given under it. That number is 2, 30, 6, 20, 12, 12, (?)

  1. 26

  2. 22

  3. 20

  4. 24
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The series is two interleaved series: 2, 6, 12, (?) and 30, 20, 12. The first series follows n(n+1) for n=1, 2, 3, 4: 1*2=2, 2*3=6, 3*4=12, 4*5=20.

AI explanation

The given series is actually two separate alternating series placed together. The first series is 2, 6, 12, ? where the differences increase by 2 (adding 4, then 6, then 8), making the missing term 12 + 8 = 20. The second alternating series is 30, 20, 12, which decreases by subtracting 10, then 8, and so on. The result is 20.

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