# Quantitative Aptitude: Number Series Set 136

1. Study the following and answer the questions:

40 , 42 , 21 , 23 , 11.5 , ?

18
16
15.0
14.5
13.5
Option E
40+2=42
42/2=21
21+2=23
23/2=11.5
11.5+2=13.5

2. 10 , 25 , 42 , 63 , 92 , ?
137
140
145
152
None of these
Option A
10+15=25
25+17=42
42+21=63
63+29=92
92+45=137

3. 100 , 100 , 50 , 12.5 , ?
1.5625
2.0505
3.5642
4.5155
None of these
Option A

4. 17 , 19 , 28 , 92 , ?
717
719
722
724
None of these
Option A
17+2^1=19
19+3^2=28
28+4^3=92

5. 13 , 25 , 61 , 121 , 205 , ?
313
310
320
325
None of these
Option A
13+(1*12)=25
25+(3*12)=61
61+(5*12)=121

6. 13 , 21 , 36 , 58 , 87 , ?
125
123
128
130
None of these
Option B

7. 4 , 11 , 25 , 53 , 109 , ?
221
225
230
245
None of these
Option A
4+(1*7)=11
11+(2*7)=25
25+(4*7)=53
53+(8*7)=109

8. 5 , 7.5 , 11.25 , 17.5 , ? , 50
28.75
22.50
25.50
29.50
30.75
Option A

9. 264 , 262 , 271 , 243 , ?
308
315
312
316
318
Option A
264 – 1^3 + 1=262
262 + 2^3 + 1 =271

10. ? , 21 , 9 , 6 , 6 , 5
60
65
80
85
None of these
Option A

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