# Quants Questions : Number Series Set 14

Hello Aspirants. Welcome to Online Quantitative Aptitude Section in AffairsCloud.com. Here we are creating question sample in Number Series, which is common for all the competitive exams. We have included Some questions that are repeatedly asked in bank exams !!!

1. 15, 18, 24, 35, 53, ?
A)63
B)80
C)74
D)98
E)None of these
Explanation :
15+3 = 18
18+(3+3) = 24
24+(6+5) = 35
35+(11+7) = 53
53+(18+9) = 80

2. 43, 68, 168, 393, 793, ?
A)1418
B)865
C)964
D)1278
E)None of these
Explanation :
43+5^2 = 68
68+10^2 = 168
168+15^2 = 393
393+20^2 = 793
793+25^2 = 1418

3. 456, 232, 120, 64, 36, ?
A)8
B)30
C)22
D)12
E)None of these
Explanation :
456-224 = 232
232 –(224/2) = 120
120-(112/2) = 64
64-(56/2) = 36
36-(28/2) = 22

4. 3, 5, 15, 65, 315, ?
A)985
B)755
C)1234
D)1565
E)None of these
Explanation :
3*5-10 =15-10 =5
5*5-10 = 25-10 =15
15*5-10 = 75-10 = 65
65*5-10=325-10 = 315
315*5-10 = 1565

5. 5, 7.5, 11.25, 16.87, ?
A)35.45
B)19.65
C)22.60
D)25.30
E)None of these
Explanation :
5*3/2 = 7.5
7.5*3/2 = 11.25
11.25*3/2 =16.87
16.87*3/2 = 25.30

6. 300, 120, 48, 19.2, 7.68, ?
A)15.89
B)10.56
C)3.072
D)0.756
E)None of these
Explanation :
300*0.4 = 120
120*0.4 = 48
48*0.4 = 19.2
19.2*0.4 = 7.68
7.68*0.4=3.072

7. 11, 5.5, 1.375, 0.172, ?
A)0.0108
B)1.754
C)0.0126
D)0.235
E)None of these
Explanation :
11*1/2 = 5.5
5.5*1/4 = 1.375
1.375*1/8 = 0.172
0.172*1/16 = 0.0108

8. 129, 25.8, 10.32, 8.256, ?
A)5.42
B)10.53
C)13.21
D)23.96
E)None of these
Explanation :
129*0.2 = 25.8
25.8*0.4 = 10.32
10.32*0.8=8.256
8.256*1.6 =13.21

9. 65, 132, 262, 526, 1050, ?
A)2421
B)1465
C)1907
D)2102
E)None of these
Explanation :
65*2+2 =132
132*2-2 = 262
262*2+2 = 526
526*2-2 = 1050
1050*2+2 = 2102

10. 39, 23, 15, 11, 9, ?
A)8
B)2
C)7
D)5
E)None of these