Number Series Model Questions Set 1 Practice Questions Answers Test with Solutions & More Shortcuts
Number Series PRACTICE TEST [2 - EXERCISES]
Number Series Model Questions Set 1
Number Series Model Questions Set 2
Question : 11
A wrong number is given in the following number series. Find out that wrong number.
2, 11, 38, 197, 1172, 8227, 65806
a) 38
b) 1172
c) 11
d) 197
e) 8227
Answer »Answer: (b)
The series is based on the following pattern:
2 × 3 + 5 = 11
11 × 4 – 6 = 38
38 × 5 + 7 = 197
197 × 6 – 8 = 1174 ; not 1172
1174 × 7 + 9 = 8227
8227 × 8 – 10 = 65806
Clearly, 1172 is the wrong number and it should be replaced by 1174.
Question : 12
What should come in place of the question mark (?) in the following number series?
5, 5, 15, 75, ?, 4725, 51975
a) 450
b) 300
c) 520
d) 525
e) None of these
Answer »Answer: (d)
The series is as follows:
× 1, × 3, × 5, × 7, × 9, × 11
Hence, ? = 75 × 7 = 525
Question : 13
Only one number is wrong in the following number series. Find out the wrong number.
8, 27, 64, 125, 218, 343
a) 218
b) 343
c) 27
d) 125
e) None of these
Answer »Answer: (a)
The series is $(2)^3$, $(3)^3$, $(4)^3$, $(5)^3$, $(6)^3$, $(7)^3$,
The wrong number is 218
It should be $(6)^3$ = 216
Question : 14
A wrong number is given in the following number series. Find out that wrong number.
4, 2, 3.5, 7.5, 26.25, 118.125
a) 26.25
b) 2
c) 118.125
d) 3.5
e) 7.5
Answer »Answer: (d)
The series is based on the following pattern
4 × .5 = 2
2 × 1.5 = 3 ; not 3.5
3 × 2.5 = 7.5
7.5 × 3.5 = 26.25
26.25 × 4.5 = 118.125
Clearly, 3.5 should be replaced by 3.
Question : 15
What should come in place of the question mark (?) in the following number series?
2, 3, 10, 15, 26, ?, 55
a) 33
b) 35
c) 32
d) 34
e) None of these
Answer »Answer: (b)
The series exhibits the pattern of $n^2$ + 1, $n^2$ – 1,
alternatively, n taking values 1, 2.............1
IMPORTANT quantitative aptitude EXERCISES
Number Series Model Questions Set 1 Online Quiz
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