A series is given with one term missing. Choose the correct alternative that will complete the series. 7, 10, 8, 11, 9, 12, ?
Question and options
A series is given with one term missing. Choose the correct alternative that will complete the series.
7, 10, 8, 11, 9, 12, ?
- 13
- 9
- 10
- 11
Answer and explanation
Correct answer: C - 10
The series alternates +3 and −2: 7 + 3 = 10, 10 − 2 = 8, 8 + 3 = 11, 11 − 2 = 9, 9 + 3 = 12. The next step is −2, so the term is 12 − 2 = 10; 13 would repeat the +3 step.
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CUSAT CAT Five-Year LL.B.
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