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The wrong number in the series 2, 9, 28, 65, 126, 216, 344 is

Asked on by | Votes 0 | Views: 492 | Tags: mathematics     | sequence and series     | quantitative aptitude     | ssc     | Add Bounty

The wrong number in the series 2, 9, 28, 65, 126, 216, 344 is
1). 65
2). 216
3). 9
4). None of these

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2 answers

6 vote
Answered by on | Votes 6 |
This question was asked some where in previous year papers of ssc, and correct answer was 216

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0 vote
Answered by on | Votes 0 |
The pattern is : $1^{3}$ + 1 = 1 + 1 = 2 $2^{3}$ + 1 = 8 + 1 = 9 $3^{3}$+ 1 = 27 + 1 = 28 $4^{3}$ + 1 = 64 + 1 = 65 $5^{3}$ + 1 = 125 + 1 = 126 $6^{3}$ + 1 = 216




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