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In the following number series, a wrong number is given. Find out that wrong number. 16 19 21 30 46 71 107

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In the following number series, a wrong number is given. Find out that wrong number.

16 19 21 30 46 71 107

(a) 19 (b) 21 (c) 30 (d) 46 (e) 71
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(a) The series is based on the following pattern :
16 + 12 = 17; not 19
17 + 22 = 21
21 + 32 = 30
30 + 42 = 46
46 + 52 = 71
71 + 62 = 107
Clearly, 19 should replaced by 17

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