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Find out the wrong number from the following number series ?

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Q.

Find out the wrong number from the following number series ?

18, 20, 23, 32, 48, 73, 109

[A] 18

[B] 20

[C] 32

[D] 73

Answer & Explanation
Option: [B]

The wrong number from the given series is 20. It is replaced by 19

18 + 1²

19 + 2²

23 + 3²

32 + 4²

48 + 5²

73 + 6²

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