Directions: The following series are based on a certain pattern. One of the number in series is missing given by ?. Find that number.
- 5, 7, 13, 25, 45, ?
66547075NoneOption D
Solution:
5+2*1=7
7+3*2=13
13+4*3=25
25+5*4=45
45+6*5=75.
- 2, 6, 30, 60, 130, ?
184196210214NoneOption C
Solution:
13+1=2
23-2=6
33+3
43-4=60
53+5=130
63-6=210.
- 5, 7, 11, ?, 35, 67
23191727NoneOption B
Solution:
5*2-3=7
7*2-3=11
11*2-3=19
19*2-3=35
35*2-3=67.
- 16, ?, 8, 12, 24, 60
1081214NoneOption B
Solution:
16*0.5=8
8*1=8
8*1.5=12
12*2=24
24*2.5=60.
- 2, 7, 14, ?, 34, 47
23271921NoneOption A
Solution:
22-2=2
32-2=7
42-2=14
52+2=23
62-2=34
72-2=47.
- 3840, ?, 240, 60, 15, 3.75
112428161760960NoneOption D
Solution:
3840/4=960
960/4=240
240/4=60
60/4=15
15/4=3.75.
- 25, 40, ?, 70, 85, 100
55506560NoneOption A
Solution:
25+15=40
40+15=55
55+15=70
70+15=85
85+15=100.
- 6, 24, 60, ?, 210, 336
9085120105NoneOption C
Solution:
1*2*3=6
2*3*4=24
3*4*5=60
4*5*6=120
5*6*7=210
6*7*8=336.
- 52, 36, ?, 42, 36, 48
46394544NoneOption D
Solution:
(52, 44, 36)
52-8=44
44-8=36.
(36, 42, 48)
36+6=42
42+6=48.
- 5760, 2880, 960, 240, ?, 8
64487286NoneOption B
Solution:
5760 /2 = 2880.
2880/3 = 960.
960/4 = 240.
240/5 = 48.
48/6 = 8.
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