# Quantitative Aptitude: Number Series Set 71

Directions: The following series are based on a certain pattern. One of the number in series is missing given by ?. Find that number.

1. 1, ?, 2, 3, 5, 8
2
4
6
1
None
Option D
Solution:
1+0=1
1+1=2
1+2=3
2+3=5
3+5=8.
2. 1, 2, 6, ?, 88, 445
15
21
45
33
None
Option B
Solution:
(1+1)*1=2
(2+1)*2=6
(6+1)*3=21
(21+1)*4=88
(88+1)*5=445.
3. 2, 5, 11, 23, 47, ?
56
65
95
82
None
Option C
Solution:
Logic: number + (number-1) + 2.
2+1(2-1)+2=5
5+4(5-1)+2=11
11+10(11-1)+2=23
23+22(23-1)+2=47
47+46(47-1)+2=95.
4. 10 , 10 , 20 , 45 , ? , 300
110
85
96
78
None
Option A
Solution:
10 * 0.5 + 5 = 10
10 * 1.0 + 10 = 20
20 * 1.5 + 15 = 45
45 * 2.0 + 20 = 110
110 * 2.5 + 25 = 300.
5. 2, 12, 36, ?, 150, 252
68
75
94
80
None
Option D
Solution:
12 + 13= 2
22 + 23=12
32 + 33=36
42 + 43=80
52 + 53=150
62 + 63=252.
6. 9, ?, 12, 14, 18, 20
12
10
9
11
None
Option B
Solution:
Logic: Prime no +7
2+7=9
3+7=10
5+7=12
7+7=14
9+7=16
11+7=18
13+7=20.
7. 20, 40, 40, ?, 5, 0.625
35
10
20
15
None
Option C
Solution:
20*2=40
40*1=40
40*1/2=20
20*1/4=5
5*1/8=5/8=0.625.
8. 12, 21, 46, 95, 176, ?
297
199
234
268
None
Option A
Solution:
12+32=21
21+52=46
46+72=95
95+92=176
176+112=297.
9. 110, 113, 104, 131, ?, 293
95
50
124
138
None
Option B
Solution:
110+3=113
113-9=104
104+27=131
131-81=50
50+243=293.
10. 13, 25, ?, 57, 83, 125
28
42
39
49
None
Option C
Solution:
13*2-1=25
25*2-11=39
39*2-21=57
57*2- 31=83
83*2-41=125.

## 6 Thoughts to “Quantitative Aptitude: Number Series Set 71”

1. jaga

Thank u mam

2. jaga

Q1 ka logic kya hai

1. previous 2 numbers are added

3. Marry..

ty az