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In the following number series only one number is wrong. Find out the wrong number. 19 68 102 129 145 154

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In the following number series only one number is wrong. Find out the wrong number.

19 68 102 129 145 154

 (a) 154 (b) 129 (c) 145 (d) 102 (e) None of these
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(d) The series is + (7)2, + (6)2, + (5)2, + (4)2, + (3)2
The wrong number is 102.
It should be 68 + (6)2 = 104

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