1000+ Aptitude Odd Man Out Questions and Answers - 1
Question: 1
Find out the wrong number in the series:
190, 166, 145, 128, 112, 100, 91
(A) 100
(B) 112
(C) 128
(D) 166
Ans: C
Go on subtracting 24, 21, 18, 15, 12, 9 from the numbers to get the next number.
Clearly, 128 is wrong.
Question: 2
Find out the wrong number in the series:
19, 26, 33, 46, 59, 74, 91
(A) 26
(B) 33
(C) 46
(D) 59
Ans: B
Go on adding 7, 9, 11, 13, 15, 17 respectively to obtain the next number.
So, 33 is wrong.
Question: 3
Find out the wrong number in the series:
3, 7, 15, 27, 63, 127, 255
(A) 7
(B) 27
(C) 63
(D) 127
Ans: B
Go on multiplying the number by 2 and adding 1 to it to get the next number. So, 27 is wrong.
Question: 4
Find out the wrong number in the series:
1, 3, 10, 21, 64, 129, 356, 777
(A) 356
(B) 129
(C) 64
(D) 10
Ans: A
A x 2 + x, B x 3 + 1, C x 2 + 1, D x 3 + 1 and so on.
So, 356 is wrong.
Question: 5
Find out the wrong number in the series:
5, 15, 30, 135, 405, 1215, 3645
(A) 15
(B) 30
(C) 405
(D) 3645
Ans: B
Multiply each term by 3 to obtain the next term. Hence, 30 is a wrong number.
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