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What should come in place of question mark ‘?’ in the following number series? 7, 23, 55, ?, 191

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What should come in place of question mark ‘?’ in the following number series?

7, 23, 55, ?, 191
1). 109
2). 111
3). 129
4). 119


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Answered by on | Votes 0 |

⇒ 23 - 12 = 8 - 1 = 7

⇒ 33 - 22 = 27 - 4 = 23

⇒ 43 - 32 = 64 - 9 = 55

⇒ 53 - 42 = 125 - 16 = 109 = ?

⇒ 63 - 52 = 216 - 25 = 191

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