Quantitative Aptitude: Number Series Set 114

Directions: The following number series follow a specific pattern. Find the number which is wrong in the respective series.

1. 24, 33, 60, 131, 384
   24
   33
   60
   131
   384
   Option D
   24+3^2=33
   33+3^3=60
   60+3^4=141 (not 131)
   141+3^5=384
   

    

2. 23, 27, 41,61, 99
   23
   27
   41
   61
   99
   Option E
   23+4*1= 27
   27+4*3=41
   41+4*5=61
   61+4*7=89 (not 99)
   

    

3. 99, 36, 14, 8, 5.66
   99
   36
   14
   8
   5.66
   Option C
   (99/3) +3=36
   (36/3)+3=15 (not 14)
   (15/3)+3= 8
   (8/3)+3=5.66
   

    

4. 20, 44, 64, 100, 140
   20
   44
   64
   100
   140
   Option C
   20 +8=28
   28+16=44
   44+24=68 (not 64)
   68+32=100
   100+40=140
   

    

5. 224, 230, 238,252 , 278
   224
   230
   238
   252
   278
   Option E
   224 +2+4=230
   230+3 + 5=238
   238+6+8=252
   252+7+9=268 (not 278)
   

    

6. 60, 63, 69, 103, 166
   60
   63
   69
   103
   166
   Option C
   60+ 1*3 =63
   63 + 3*5=68 (not 69)
   68 + 5*7 =103
   103+7*9=166
   

    

7. 1553, 1547, 1535 , 1517, 1490
   1553
   1547
   1535
   1517
   1490
   Option E
   1553 – 6=1547
   1547-12=1535
   1535-18=1517
   1517-24=1493
   

    

8. 225, 230, 261, 311, 433
   225
   230
   261
   311
   433
   Option B
   225 + 3^2 +1=235 (not 230)
   235 + 5^2 +1=261
   261 +7 ^2 +1=311
   311+ 11^2 +1=433
   

    

9. 4440, 4343, 4249, 4158, 4060
   4440
   4343
   4249
   4158
   4060
   Option E
   4440 – 10^2+3=4343
   4343 – 10^2+6=4249
   4249 – 10^2+9=4158
   4158 – 10^2+12=4070 (not 4060)
   

    

10. 50, 170, 600, 120, 20,140
    50
    170
    600
    20
    140
    Option B
    50 * 3= 150 (not 170)
    150* 4=600
    600/5=120
    120/6=20
    20*7=140
    

     

11. 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 8.25)
    

     

12. 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
    

     

13. 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
    

     

14. 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
    

     

15. 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
    

     

16. 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
    

     

17. 300, 301, 313, 326, 370
    300
    301
    313
    326
    370
    Option D
    300-9+10=301
    301-8+20=313
    313-7+30=336 (not 326)
    336-6+40=370
    

     

18. 2, 8, 0, 12, 6, 11
    2
    8
    0
    12
    6
    Option E
    (2*1)+6=8
    (2*2)-4= 0
    (2*3)+6=12
    (2*4)-4= 4 (not 6)
    (2*5)+6=11
    

     

19. 1.5, 7.5, 1.5, 3.75, 1.25, 2.625
    1.5
    7.5
    3.75
    1.25
    2.625
    Option D
    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

     

20. 6, 20, 31, 40, 53, 64
    6
    20
    31
    40
    53
    Option D
    6+4+10=20
    6+5+20=31
    6+6+30=42(not 40)
    6+7+40=53
    6+8+50=64
    

     

21. 1111, 1110, 1099, 988, – 128
    1111
    1110
    988
    1099
    -128
    Option E
    1111-1=1110
    1110-11=1099
    1099-111=988
    988-1111=- 123 (not -128)
    

     

22. 10, 17, 21, 25, 26
    10
    17
    21
    25
    26
    Option C
    10+7=17
    10+7+5=22
    10+7+5+3=25
    10+7+5+3+1=26
    

     

23. 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)
    

     

24. 10.5, 15.5, 5.5, 20.5 , 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)
    

     

25. 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)
    

     

26. 50, 48.1, 46.11, 42 ,40.0001
    50
    48.1
    46.11
    42
    40.0001
    Option D
    50-1.9=48.1
    48.1-1.99=46.11
    46.11-1.999=44.111 (not 42)
    

     

27. 8, 19, 61, 244 , 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
    

     

28. 55, 46,39,32,31
    55
    46
    39
    32
    31
    Option D
    55 -5-4=46
    46-4-3=39
    39-3-2=34(not 32)
    34-2-1=31
    

     

29. 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)
    

     

30. 221, 212, 220, 213, 224, 214
    221
    212
    220
    213
    224
    Option E
    221-9=212
    212+8=220
    220-7=213
    213+6=219 (not 224)
    219-5=214