Find the missing number in the series. 21, 22, 24, 27, 31, 36, ?
Question and options
Find the missing number in the series.
21, 22, 24, 27, 31, 36, ?
- 41
- 72
- 42
- 44
Answer and explanation
Correct answer: C - 42
The gaps between terms rise by one each time: +1, +2, +3, +4, +5. The next gap is +6, so 36 + 6 = 42. The answer 41 repeats the gap of +5 instead of increasing it.
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CUSAT Three-Year LL.B.
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