Aptitude Odd Man Out Questions Answers for Competitive Exams - 2
Question: 6
Find out the wrong number in a given series.
2, 6, 12, 72, 824
(A) 6
(B) 12
(C) 72
(D) 824
Ans: D
2 x 6 = 12; 6 x 12 = 72; 12 x 72 = 864.
Therefore, 824 is wrong.
Question: 7
Find out the wrong number in a given series.
263, 284, 393, 481, 482
(A) 482
(B) 481
(C) 393
(D) 284
Ans: B
Second digit = First digit x Third digit
Except 481, all other terms in the sequence follow the above condition.
Therefore, 481 is wrong.
Question: 8
Find out the wrong number in a given series.
2, 3, 6, 15, 52.5, 157.5, 630
(A) 6
(B) 15
(C) 52.5
(D) 157.5
Ans: C
2nd term = (1st term x 1.5) = 2 x 1.5 = 3;
3rd term = (2nd term x 2) = 3 x 2 = 6;
4th term = (3rd term x 2.5) = 6 x 2.5 = 15;
5th term = (4th term x 3) = 15 x 3 = 45;
Therefore, 52.5 is wrong.
Question: 9
Find out the wrong number in a given series.
1, 2, 8, 33, 148, 760, 4626
(A) 2
(B) 33
(C) 148
(D) 760
Ans: D
2nd term = (1st term x 1 + 12) = 1 x 1 + 12 = 2;
3rd term = (2nd term x 2 + 22) = 2 x 2 + 22 = 8;
4th term = (3rd term x 3 + 32) = 8 x 3 + 32 = 33;
5th term = (4th term x 4 + 42) = 33 x 4 + 42 = 148;
6th term = (5th term x 5 + 52 ) = 148 x 5 + 52 = 765.
Therefore, 760 is wrong.
Question: 10
Find out the wrong number in a given series.
3, 7, 15, 39, 63, 127, 255, 511
(A) 7
(B) 15
(C) 39
(D) 67
Ans: C
Go on multiplying 2 and adding 1 to get the next number.
So, 39 is wrong.
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