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1. One term in the number series is wrong. Find out the wrong term.
1, 5, 9, 15, 25, 37, 49
So, 15 is wrong and must be replaced by (42 + 1) i.e. 17.
1, 5, 9, 15, 25, 37, 49
Solution:
The terms of the given series are 12, (22 + 1), 32, (42..+ 1), 52, (62 + 1), 72.So, 15 is wrong and must be replaced by (42 + 1) i.e. 17.