Number Series (Previous Year Questions )test -1
-
14, 8, 7, 11.5, 22, ?
-
54
-
64
-
62
-
58
-
56
-
Challenge your mathematical prowess with this Number Series quiz, featuring a series of progressively complex problems that test your ability to discern patterns and calculate the next number in a sequence.
Quiz Preview
- 2.
8, 14, 25, 46, 82, ?
-
132
-
130
-
138
-
128
-
142
Correct Answer
A. 138Explanation
14 - 8 = 6
25 - 14 =11
46 - 25 = 21
82 - 46 = 36
Now take the difference of difference
11 - 6 = 5
21 - 11 = 10
36 - 21 = 15
The next term will be 20. The difference will be 36 + 20 = 56.
The required term is 82 + 56 = 138.Rate this question:
-
- 3.
13, 14, 30, 93, ?, 1885
-
358
-
336
-
364
-
376
Correct Answer
A. 376Explanation
13*1 + 1 = 14
14*2 +2 = 28+2 = 30
30*3 + 3 = 90+3 =93
93*4 + 4 = 372+4 = 376Rate this question:
-
- 4.
65, 70, 63, 74, 61, ?
-
78
-
52
-
72
-
58
Correct Answer
A. 78Explanation
We can note that consecutive prime numbers are either added or subtracted starting from 5.
65+5 = 70
70-7 = 63
63+11 = 74
74-13 = 61
61+17 = 78Rate this question:
-
- 5.
11, 20, 38, 74, ?
-
146
-
154
-
128
-
136
Correct Answer
A. 146Explanation
11*2 - 2 = 22-2 =20
20*2 - 2= 40-2 = 38
38*2 - 2= 76 - 2 = 74
74*2 - 2 = 148-2 = 146Rate this question:
-
- 6.
15, 21, 38, 65, 101, ?
-
124
-
145
-
136
-
158
Correct Answer
A. 145Explanation
21 - 15 = 6
38 - 21 = 17
65 - 38 = 27
101 - 65 = 36
Now, let us take the difference of difference.
17 - 6 = 11
27 - 17 = 10
36 - 27 = 9
Continuing the sequence, we get the next term as 36+8 = 44
101 + 44 = 145.Rate this question:
-
- 7.
24, 28, 19, 35, 10, ?
-
26
-
36
-
16
-
46
Correct Answer
A. 46Explanation
24 + 4 = 28
28 - 9 = 19
19 + 16 = 35
35 - 25 = 10
10 + 36 = 46
The pattern is +4, -9, +16, -25, +36 (Squares with alternate sign)Rate this question:
-
- 8.
7, 16, 45, 184, 915, ?
-
2092
-
5496
-
1048
-
4038
Correct Answer
A. 5496Explanation
7*2 + 2= 14+2 = 16
16*3 - 3 = 48 - 3 = 45
45*4 + 4 = 180+4 = 184
184*5 - 5 = 920 - 5 = 915.
915*6 + 6 = 5490+ 6 = 5496.Rate this question:
-
- 9.
9, 5, 6, 10.5, 23, ?
-
85
-
60
-
78
-
49
Correct Answer
A. 60Explanation
9*0.5 + 0.5 = 4.5 + 0.5 = 5
5*1 +1 = 5+1 =6
6*1.5 + 1.5 = 9+1.5 =10.5
10.5*2 + 2 = 21+2 = 23
23*2.5 + 2.5 = 57.5+2.5 = 60.Rate this question:
-
- 10.
59, 66, 80, 108, ?, 276
-
150
-
125
-
164
-
132
Correct Answer
A. 164Explanation
59 + 7 = 66
66 + 14 = 80
80+ 28 = 108
108 + 56 = 164Rate this question:
-
- 11.
47, 23, 11, 5, 2, ?
-
0.2
-
0.5
-
1
-
1.5
Correct Answer
A. 0.5Explanation
47*0.5 - 0.5= 23.5 - 0.5 = 23
23*0.5 - 0.5 = 11.5 - 0.5 =11
11*0.5 - 0.5 = 5.5 - 0.5 = 5
5*0.5 - 0.5 = 2.5 - 0.5 = 2
2*0.5 - 0.5 = 1 - 0.5 = 0.5Rate this question:
-
- 12.
1, 2, 6, 21, 88, ?
-
445
-
615
-
216
-
539
Correct Answer
A. 445Explanation
1*1 + 1 = 2
2*2 + 2 = 6
6*3 + 3 = 21
21*4 + 4 = 88
88*5 + 5 = 445Rate this question:
-
- 13.
9, 10.8, 14.4, 21.6, ?, 64.8
-
36
-
44
-
34
-
37.6
Correct Answer
A. 36Explanation
9 + 1.8 = 10.8
10.8 + (2*1.8) = 10.8 + 3.6 = 14.4
14.4 + (2*3.6) = 14.4+7.2 = 21.6
21.6 + (2*7.2) = 21.6 + 14.4 = 36Rate this question:
-
- 14.
6, 5, 8, 21, 80, ?
-
268
-
192
-
395
-
364
Correct Answer
A. 395Explanation
6*1 -1 = 5
5*2 - 2 = 10-2 =8
8*3 - 3 = 24-3 = 21
21*4-4 = 84-4 = 80
80*5-5 = 395Rate this question:
-
- 15.
13, 6, 5, 6, 10, ?
-
19
-
25
-
22.5
-
17.5
Correct Answer
A. 22.5Explanation
13*0.5 - 0.5 = 6.5-0.5 = 6
6*1 - 1 = 6-1 = 5
5*1.5 - 1.5 = 7.5 - 1.5 = 6
6*2 - 2 = 12-2 = 10
10*2.5 - 2.5 = 25-2.5 =22.5Rate this question:
-
Quiz Review Timeline (Updated): Mar 20, 2023 +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
-
Current Version
-
Mar 20, 2023Quiz Edited by
ProProfs Editorial Team -
Aug 12, 2017Quiz Created by
Ashwin
Back to top