Top 10,000+ Aptitude Questions and Answers - 1
Question: 1
Find out the wrong number in each sequence:
16, 32, 64, 81, 100, 144, 190
(A) 36
(B) 81
(C) 100
(D) 190
Ans: D
Each number is the square of a composite number except 190.
Question: 2
Find out the wrong number in each sequence:
22, 33, 69, 99, 121, 279, 594
(A) 594
(B) 279
(C) 121
(D) 33
Ans: B
Each number except 279 is a multiple of 11.
Question: 3
Find out the wrong number in each sequence:
10, 14, 28, 32, 64, 68, 132
(A) 28
(B) 32
(C) 68
(D) 132
Ans: D
Alternately, we add 4 and double the next.
So, 132 is wrong. It must be ( 68 x 2) i.e., 136.
Question: 4
Find out the wrong number in each sequence:
1, 8, 27, 64, 124, 216, 343
(A) 8
(B) 27
(C) 64
(D) 124
Ans: D
The numbers are 13, 23, 33, 43 etc. So, 124, is wrong; it must have been 53 i.e. 125.
Question: 5
Find out the wrong number in each sequence:
105, 85, 60, 30, 0, - 45, - 90
(A) 85
(B) 60
(C) -45
Ans: D
Subtract 20, 25, 30, 35, 40, 45 from successive numbers. So 0 is wrong.
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