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Odd man out of the series 90 72 56 42 36 20

Correct Answer: 36

Explanation:

The given number series is 90 72 56 42 36 20


9 x 10 = 90


8 x 9 = 72


7 x 8 = 56


6 x 7 = 42


5 x 6 = 30 (not 36) 


4 x 5 = 20


 


Hence, the odd man in the given number series is 36.


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