# Quantitative Aptitude: Number Series Set 122

Directions (1-10): Find the wrong term in the following series each of which follows some particular pattern:

1. 1121.., 1120.., 1109.., 998.., – 128
1121
1120
1109
998
-128
Option E
1121-1=1120
1120-11=1109
1109-111=998
998-1111=- 113 (not -128)

2. 20.., 27.., 32.., 35.., 28
20
27
32
35
28
Option E
20+7=27
20+7+5=32
20+7+5+3=35
20+7+5+3+1=36 (not 28)

3. 100 .., 909.., 999.., 1899.., 10999
100
909
999
1899
10999
Option E
100*9+9=909
100*9+99=999
100*9+999=1899
100*9+9999=10899 (not 10999)

4. 10.5â€¦, 15.5.., 5.5.., 20.5â€¦ , 15.5
10.5
15.5
5.5
20.5
15.5
Option E
10.5+5=15.5
15.5-10=5.5
5.5+15=20.5
20.5-20=0.5 (not 15.5)

5. 10.., 7.., 6.., 6.., 6.5.., 7
10
7
6
6.5
7
Option E
10/2+2= 7
7/2+2.5= 6
6/2+3= 6
6/2+3.5=6.5
6.5/2+4=7.25 (not 7)

6. 69.., 60.., 58.1.., 56.11.., 52
69
60
58.1
56.11
52
Option E
69-9=60
60-1.9=58.1
58.1-1.99=56.11
56.11-1.999=54.111 (not 52)

7. 8.., 19.., 61.., 244â€¦ , 1251
8
19
61
244
1251
Option D
8*2+3=19
19*3+4=61
61*4+5=249(not 244)
249*5+6=1251

8. 65.., 56..,49..,42..,41
65
56
49
42
41
Option D
65 -5-4=56
56-4-3=49
49-3-2=44(not 42)
44-2-1=41

9. 200.., 45.., 14.., 7.8.., 6.6
200
45
14
7.8
6.6
Option E
200/5 +5=45
45/5 +5=14
14/5+5=7.8
7.8/5+5=6.56 (not 6.6)

10. 231.., 222.., 230.., 223.., 234.., 224
231
222
230
223
234
Option E
231-9=222
222+8=230
230-7=223
223+6=229 (not 234)
229-5=224

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