# Quantitative Aptitude: Number Series 79

Directions(1-10): The following series are based on a certain pattern. One of the number in series is missing given by ?. Find that number.

1. 71 , ? , 868, 4345, 26076
800
216
642
755
None of these
Option B
71 *3 +3 =216
216*4+4=868
868*5+5=4345
4345*6+6=26076

2. 1, 8, 64, 512, ?,32768
4444
3999
4425
4096
None of these
Option D
1*8=8
8*8=64
64*8=512
512*8=4096
4096*8=32,768

3. 186, 115, 71, 44, 27, ?
17
10
20
11
None of these
Option A
186 first term
115 second term
186-115=71
71-44=27
44-27=17

4. 18.3, 20.6 , 16, 22.9 , 13.7, ?, 11.4
22.2
25.2
20.4
30.5
None of these
Option B
18.3 + 2.3 = 20.6
20.6 – 4.6 = 16
16 + 6.9 = 22.9
22.9 – 9.2 = 13.7
13.7 +11.5 = 25.2
25.2 – 13.8 = 11.4

5. 5,25,7,?,9,19
20
15
22
18
None of these
Option C
Add 2 and substract 3 alternatively. 5+2=7
25-3=22
7+2=9
22-3= 19
9+2=11

6. 1000,1500,?,3375,5062.5,7593.75
2155
2100
None of these
2250
2250
Option E
1000*3/2=1500
1500*3/2=2250
2250*3/2=3375
3375*3/2=5062.5
5062.5*3/2=7593.75

7. 2,3,6,?,45,157.5
15
11
20
None of these
9
Option A
2*1.5=3
3*2=6
6*2.5=15
15*3=45
45*3.5=157.5

8. 5,11,23,47,?,191,383
None of these
95
100
88
74
Option B
5*2+1=11
11*2+1=23
23*2+1=47
47*2+1=95
95*2+1=191
191*2+1=383

9. 4,5,13,40,104,?,445
229
198
210
None of these
200
Option A
4+1^3=5
5+2^3=13
13+3^3=40
40+4^3=104
104+5^3=229
229+6^3=445

10. 47,?,49,55,67,87,117
45
47
50
None of these
52
Option B
47+(0^2+0)=47
47+(1^2+1)=49
49+(2^2+2)=55
55+(3^2+3)=67
67+(4^2+4)=87
87+(5^2+5)=117