Practice Number series - quantitative aptitude Online Quiz (set-2) For All Competitive Exams
Q-1) What should come in place of the question mark (?) in the following number serie?
13, 20, 14, 19, 15, ?
(a)
(b)
(c)
(d)
(e)
Hence, question mark (?) should be replaced by 18.
Q-2) What should come in place of the question mark (?) in the following number series?
0, 7, 26, ?, 124, 215
(a)
(b)
(c)
(d)
(e)
Try the pattern $n^3$ – 1. n = 1, 2, .......
Q-3) What should come in place of the question mark (?) in the following number series?
2, 4, ?, 16, 32
(a)
(b)
(c)
(d)
(e)
The terms exhibit the pattern $2^1$, $2^2$, $2^3$ and so on.
Q-4) What should come in place of the question mark (?) in the following number series?
24, 49, ?, 94, 15, 31, 59, 58
(a)
(b)
(c)
(d)
(e)
It is a combination of two series, namely
24, 49, ?, 94; and 15, 31, 59, 58
The two series correspond to
x, (2x + 1), (4x – 1), (4x – 2)
Hence the missing term is
4 x 24 – 1 = 95
Q-5) What should come in place of the question mark (?) in the following number series?
5, 10, 13, 26, 29, 58, ?, 122
(a)
(b)
(c)
(d)
(e)
Add 3 after doubling the previous number.
Q-6) What should come in place of the question mark (?) in the following number series?
29, 23, ?, 17, 13, 11, 7
(a)
(b)
(c)
(d)
(e)
This is a series of prime numbers :
Q-7) What should come in place of the question mark (?) in the following number serie?
102, 104, 99, 97, 106, ?
(a)
(b)
(c)
(d)
(e)
The series is as follows
Q-8) What should come in place of the question mark (?) in the following number series?
336, 210, 120, ?, 24, 6, 0
(a)
(b)
(c)
(d)
(e)
Note that
0 = $1^3$ – 1
6 = $2^3$ – 2
24 = $3^3$ – 3
Q-9) Only one number is wrong in the following number series. Find out the wrong number.
4, 6, 18, 49, 201, 1011
(a)
(b)
(c)
(d)
(e)
The series is
× 1 + 2, × 2 + 3, × 3 + 4, × 4 + 5, × 5 + 6
The wrong number is 18.
It should be 6 × 2 + 3 = 15
Q-10) What should come in place of the question mark (?) in the following number serie?
70000, 14000, 2800, ?, 112, 22.4
(a)
(b)
(c)
(d)
(e)
The series is as follows:
÷ 5
Hence, ? = 2800 ÷ 5 = 560
Q-11) What should come in place of the question mark (?) in the following number series?
10, 14, 25, 55, 140, (?)
(a)
(b)
(c)
(d)
(e)
The series is as follows:
× 3 – 16, × 3 – 17, × 3 – 20, × 3 – 25, × 3 – 32
Hence, ? = 140 × 3 – 32 = 388
Q-12) Only one number is wrong in the following number series. Find out the wrong number.
19, 68, 102, 129, 145, 154
(a)
(b)
(c)
(d)
(e)
The series is + $(7)^2$, + $(6)^2$, + $(5)^2$, + $(4)^2$, + $(3)^2$
The wrong number is 102.
It should be 68 + $(6)^2$ = 104
Q-13) What should come in place of the question mark (?) in the following number serie?
12, 33, 96, ?, 852, 2553
(a)
(b)
(c)
(d)
(e)
The series is as follows: × 3 – 3
Hence, ? = 96 × 3 – 3 = 285
Q-14) What should come in place of the question mark (?) in the following number serie?
0, 5, 18, 43, 84, 145, ?
(a)
(b)
(c)
(d)
(e)
Q-15) What should come in place of the question mark (?) in the following number serie?
7, 26, 63, 124, 215, ?
(a)
(b)
(c)
(d)
(e)
7 = $2^3$ – 1
26 = $3^3$ – 1
63 = $4^3$ – 1
124 = $5^3$ – 1
215 = $6^3$ – 1
? = $7^3$ – 1 = 342
Q-16) What should come in place of the question mark (?) in the following number series?
4000, 2008, 1012, ?, 265, 140.5, 78.25
(a)
(b)
(c)
(d)
(e)
The series is as follows:
÷ 2 + 8
Hence, ? = 1012 ÷ 2 + 8 = 514
Q-17) What should come in place of the question mark (?) in the following number serie?
22, 23, 27, 36, 52, 77, ?
(a)
(b)
(c)
(d)
(e)
The given number series is based on the following pattern:
22 + $1^2$ = 22 + 1 = 23
23 + $2^2$ = 23 + 4 = 27
27 + $3^2$ = 27 + 9 = 36
36 + $4^2$ = 36 + 16 = 52
52 + $5^2$ = 52 + 25 = 77
∴ ? = 77 + $6^2$
= 77 + 36 = 113
Q-18) What should come in place of the question mark (?) in the following number series?
11, 57, 149, 333, 701, (?)
(a)
(b)
(c)
(d)
(e)
The series is as follows: ×2 + 35
Hence, ? = 701 × 2 + 35 = 1437
Q-19) What should come in place of the question mark (?) in the following number serie?
7413, 7422, 7440, ?, 7503, 7548
(a)
(b)
(c)
(d)
(e)
The series is as follows
+ 9, + 18, + 27, +36, + 45
Hence, ? = 7440 + 27 = 7467
Q-20) Only one number is wrong in the following number series. Find out the wrong number.
2, 54, 300, 1220, 3674, 7350
(a)
(b)
(c)
(d)
(e)
The series is
× 6 + 42, × 5 + 30, × 4 + 20, × 3 + 12, × 2 + 6,
The wrong number is 3674
It should be 1220 × 3 + 12 = 3672