Wrong Number Series Quiz Questions for Bank Exams Pdf - 1
Question: 1
In each of the following questions, one term in the number series is wrong. Find out the wrong term.
1, 3, 7, 15, 27, 63, 127
(A) 7
(B) 15
(C) 27
(D) 63
Ans: C
The sequence is +2, +4, +8 ..... i.e. +2, +22, +23, ....
So, 27 is wrong and must be replaced by (15 + 24) i.e. (15 + 16) or 31.
Question: 2
1, 5, 9, 16, 25, 37, 49
(A) 37
(B) 25
(C) 15
(D) 9
Ans: C
The given sequence is a combination of two series:
I. 1, 9, 25, 49 and
II. 5, 15, 37
The pattern in I is +8, +16, +24.
So, 16 is wrong and must be replaced by (42 + 1) i.e. 17.
Question: 3
16, 22, 30, 45, 52, 66
(A) 30
(B) 45
(C) 52
(D) 68
Ans: B
The correct sequence is +6, +8, +10, + 12, + 14.
So, 45 is wrong and must be replaced by (30 + 10) i.e. 40.
Question: 4
15, 16, 22, 29, 45, 70
(A) 70
(B) 45
(C) 22
(D) 16
Ans: C
The pattern is +1, +4, +9, +16, +25, .. i.e. +12, + 22, + 32, + 42, + 52, ...
So, 22 is wrong and must be replaced by (16 + 4) i.e. 20.
Question: 5
8, 13, 21, 32, 47, 63, 83
(A) 47
(B) 32
(C) 21
(D) 13
Ans: A
The sequence is +5, +8, +11, ....
47 is wrong and must be replaced by (32 + 14) i.e. 46.
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