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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