Top 10,000+ Aptitude Questions and Answers - 2

Question: 6

Find out the wrong number in each sequence:
8, 13, 21, 32, 47, 63, 83

(A) 32

(B) 47

(D) 83

Ans: B

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

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

Question: 7

Find out the wrong number in each sequence:
125, 123, 120, 115, 108, 100, 84

(A) 84

(B) 100

(D) 123

Ans: B

Prime numbers 2, 3, 5, 7, 11, 13 have successively been subtracted. So, 100 is wrong. It must be ( 108 – 11) i.e. 97.

Question: 8

Find out the wrong number in each sequence:
36, 54, 18, 27, 9, 18.5, 4.5

(A) 4.5

(B) 8.5

(D) 18

Ans: C

The terms are alternately multiplied by 1.5 and divided by 3. However, 18.5 does not satisfy it.

Question: 9

Find out the wrong number in each sequence:
1, 2, 6, 15, 31, 56, 91

(A) 15

(B) 31

(D) 91

Ans: D

Add 1², 2², 3², 4², 5², 6². So, 91 is wrong.

Question: 10

Find out the wrong number in each sequence:
5, 16, 6, 16, 7, 16, 9

(A) 6

(B) 7

(D) 9

Ans: D

Terms at odd places are 5, 6, 7, 8 etc. and each term at even place is 16. So, 9 is wrong.

Model MCQ Online Test

Error Report!

REGISTER TO GET FREE UPDATES