Direction: Find the missing number in the following series 2, 5, 9, _______, 20, 27
Question and options
Direction: Find the missing number in the following series
2, 5, 9, _______, 20, 27
2, 5, 9, _______, 20, 27
- 11
- 12
- 13
- 14
Answer and explanation
Correct answer: D - 14
The differences go up by one each step: 2 to 5 is +3 and 5 to 9 is +4, so the next term is 9 + 5 = 14. Checking forward, 14 + 6 = 20 and 20 + 7 = 27, which matches the series. Choosing 13 breaks the check, since 20 - 13 = 7 would repeat the final gap.
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CUSAT CAT Integrated IPR Ph.D.
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