Complete the series. 2, 6, 12, 20, 30, 42, _____?
- 50
- 54
- 56
- 62
Explanation
Find the differences:
6 − 2 = 4
12 − 6 = 6
20 − 12 = 8
30 − 20 = 10
42 − 30 = 12
The differences increase by 2 each time.
Next difference = 14
42+14=56
Last updated on 30 Oct 2026
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