Quantitative Aptitude: Number Series Set 121

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

1. 22 .., 220.., 11.., 330.., 8.35
22
220
11
330
8.35
Option E
22*10=220
220/20=11
11*30=330
330/40=8.25 (not 8.35)

2. 16.., 21.., 52.., 161.., 704
16
21
52
161
704
Option D
(16*1) + 5=21
(21*2)+10=52
(52*3) +15=171
(171*4)+20=704

3. 225…, 223.., 167.., 119.., 81.., 43
225
223
167
119
81
Option E
(15^2+1)-3=223
(13^2+3)-5=167
(11^2+5)-7=119
(9^2+7)-9= 79( not 81)
(7^2 + 5)-11=43

4. 10.., 40.., 480.., 30730…, 7864320
10
40
480
30730
7864320
Option D
10 * 4=40
30* 42=480
480* 43=30720 (not 30730)
30720* 44=7864320

5. 1. 5 .., 3.., 5.5.. , 9.., 13.5
1.5
3
5.5
9
13.5
Option C
1.5*2=3
3*1.5=4.5 (not 5.5)
4.5*2=9
9*1.5=13.5

6. 4.., 12.., 56..,224..,230
4
12
56
224
230
Option E
4+8=12
12*4=48
48+8=56
56*4=224
224+8=232

7. 310.., 311.., 323.., 336.., 380
310
311
323
336
380
Option E
310-9+10=311
311-8+20=323
323-7+30=346 (not 336)
346-6+40=380

8. 12.., 1 8.., 20.., 42.., 46.., 66
12
18
20
42
46
Option E
(12*1)+6=18
(12*2)-4=2 0
(12*3)+6=42
(12*4)-4=4 4 (not4 6)
(12*5)+6=66

9. 1.5.., 7.5.., 1.5.., 3.75.., 1.25.., 2.625
1.5
7.5
3.75
1.25
0.75
Option E
1.5 *5 =7.5
7.5/5=1.5
1.5*2.5=3.75
3.75/5=0.75 (not 1.25)
0.75*3.5=2.625

10. 16.., 30.., 41.., 50.., 63.., 74
16
30
41
50
63
Option D
16+4+10=30
16+5+20=41
16+6+30=52(not 50)
16+7+40=63
16+8+50=74