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Find out the odd one out.
3,10,21,36,55,70,105

70
36
3
105
Explanation:

The pattern in the series is
1*3, 2*5, 3*7, 4*9, 5*11, 6*13, 7*15.
So the series will be 3,10,21,36,55,78,105.
So 70 is wrong term in the series.
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