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Odd Man Out Series Questions

Dear Reader,
Below are three questions of odd man out series, you have to find the wrong number in each series.

Question 1

28, 29, 60, 123, 736, 3685

a)29 b)123 c)736 d)3685

Answer : b)123

Solution :

The given series are in the following form,

28 x 1 + 1 = 29
29 x 2 + 2 = 60
60 x 3 + 3 = 183
183 x 4 + 4 =736
736 x 5 + 5 =3685

Instead of 183, 123 is given in the series. So 123 is the odd one.

Question 2

1853, 925, 461, 229, 113, 55, 11

a)229 b)113 c)55 d)11

Answer : d)11

Solution:

Each number in the series is obtained by subtracting 3 and divide the result by 2.

1853 - 3 / 2 = 925
925 - 3 / 2 = 461
461 - 3 / 2 = 229
229 - 3 / 2 = 113
113 - 3 / 2 = 55
55 - 3 / 2 = 26
26 - 3 / 2 = 11.5

Clearly, 11 is wrong.

Question 3

1900, 1876, 1855, 1837, 1821, 1810, 1801

a)1855 b)1837 c)1821 d)1900

Answer : c)1821

Solution :

The above series is formed by subtracting multiples of 3 starting from 24 in reverse order.
1900 - 24 = 1876
1876 - 21 = 1855
1855 - 18 = 1837
1837 - 15 = 1822
1822 - 12 = 1810 ... and so on.

The odd one is 1821 which has to be 1822.


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