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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