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Select the option that can replace the question mark (?) in the following series.

6, 11, 33, 65, 141, ?


1. 278
2. 281
3. 321
4. 192

1 Answer

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Best answer
Correct Answer - Option 2 : 281

The given series: 6, 11, 33, 65, 141, ?
It is an alternate series as shown below:

6 × 2 - 1 = 11
11 × 2 + 11 = 33
33 ​× 2 - 1 = 65
65 ​× 2 + 11 = 141
141 ​× 2 - 1 = 281

Hence, 281 will be the next term in the series.

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