Aptitude - Odd Man Out and Series

Exercise : Odd Man Out and Series - Pick Wrong No.
Directions to Solve
Find out the wrong number in the given sequence of numbers.

1.
582, 605, 588, 611, 634, 617, 600
634
611
605
600
Answer: Option
Explanation:
Alternatively 23 is added and 17 is subtracted from the terms. So, 634 is wrong.

2.
22, 33, 66, 99, 121, 279, 594
33
121
279
594
Answer: Option
Explanation:
Each of the number except 279 is a multiple of 11.

3.
8, 13, 21, 32, 47, 63, 83
47
63
32
83
Answer: Option
Explanation:

Go on adding 5, 8, 11, 14, 17, 20.

So, the number 47 is wrong and must be replaced by 46.


4.
1, 8, 27, 64, 124, 216, 343
8
27
64
124
Answer: Option
Explanation:
The numbers are 13, 23, 33, 43 etc. So, 124 is wrong; it must have been 53 i.e., 125.

5.
1, 2, 6, 15, 31, 56, 91
31
91
56
15
Answer: Option
Explanation:

1, 1 + 12 = 2, 2 + 22 = 6, 6 + 32 = 15, 15 + 42 = 31, 31 + 52 = 56, 56 + 62 = 92

Last number of given series must be 92 not 91.