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Complete the series.

26, 63, 124, 215,342, ?


1. 391
2. 421 
3. 511
4. 481

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Best answer
Correct Answer - Option 3 : 511

The logic is:

33 - 1 = 27 - 1 = 26

43 - 1 = 64 - 1 = 63

53 - 1 = 125 - 1 = 124

63 - 1 = 216 - 1 = 215

73 - 1 = 343 - 1 = 342

83 - 1 = 512 - 1 = 511

Hence, ‘511’ is the correct answer.

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