Aptitude Odd Man Out Questions Answers for Competitive Exams - 1
Question: 1
Find out the wrong number in a given series.
644, 328, 164, 84, 44, 24, 14
(A) 44
(B) 84
(C) 164
(D) 328
Ans: D
644 – 320 = 324
324 – 160 = 164
164 – 80 = 84
84 – 40 = 44
44 – 20 = 24
24 – 10 = 14
Hence 328 is wrong number, correct number is 328.
Question: 2
Find out the wrong number in a given series.
445, 221, 109, 46, 25, 11, 4
(A) 11
(B) 25
(C) 46
(D) 109
Ans: C
Go on subtracting 3 and dividing the result by 2 to obtain the next number.
Clearly, 46 is wrong.
Question: 3
Find out the wrong number in a given series.
36, 64, 81, 125, 169
(A) 169
(B) 125
(C) 81
(D) 64
Ans: B
The sequence is 62, 82, 92, 112, 132.
All numbers except 125 are perfect squares.
Therefore 125 is wrong.
Question: 4
Find out the wrong number in a given series.
124, 133, 142, 152, 160
(A) 133
(B) 142
(C) 152
(D) 160
Ans: C
The sequence is an A.P. with common difference 9.
Therefore 142 + 9 = 151.
Therefore 152 is wrong.
Question: 5
Find out the wrong number in a given series.
6, 13, 18, 25, 30, 37, 40
(A) 25
(B) 30
(C) 37
(D) 40
Ans: D
The difference between two successive terms from the beginning are 7, 5, 7, 5, 7, 5.
So 40 is wrong.
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