Identify the correct option to complete the following series.
1, 3, 5, 11, 21, 43, 85, 171,?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 341.
| Understanding |
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Given series: 1, 3, 5, 11, 21, 43, 85, 171,? The logic used here is: 1 × 2 + 1 = 3 3 × 2 - 1 = 5 5 × 2 + 1 = 11 11 × 2 - 1 = 21 21 × 2 + 1 = 43 43 × 2 - 1 = 85 85 × 2 + 1 = 171 171 × 2 - 1 = 341 The next term in the series is 341. Hence, option 3 is the correct answer. |