Find the Odd one out of the given series
6, 15, 35, 77, 165, 221
The terms of the series are products of two consecutive prime numbers i.e.
(2 x 3), (3 x 5), (5 x 7), (7 x 11),.....
So, 165 is wrong and must be replaced by (11 x 13) i.e. 143.
Find the odd man out?
396, 462, 572, 427, 671, 264.
Here the given series is 396, 462, 572, 427, 671, 264.
In all the terms, the middle digit is the sum of first and third digit except 427.
So the Odd number in the given series is 427.
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