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. 10.5…, 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)
   
   
    



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.., 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
   
   
    



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