Quantitative Aptitude: Number Series Set 65

Shubhra
  1. 20, 31, ?, 86, 130
    48
    42
    53
    36
    None
    Option C
    Solution:
    20+11*1=31
    31+11*2=53
    53+11*3=86
    86+11*4=130.
  2. 15, 13 , 16, 11, ?
    18
    22
    19
    24
    None
    Option A
    Solution:
    15-2=13
    13+3=16
    16-5=11
    11+7=18.
  3. 1/10, 1/5, 3/5, ?, 12
    4/9
    12/5
    11/5
    8/9
    None
    Option B
    Solution:
    1/10*2=1/5
    1/5*3=3/5
    3/5*4=12/5
    12/5*5=12.
  4. 4, ?, 369, 513, 634
    200
    230
    256
    310
    None
    Option A
    Solution:
    4+ 142=4+196=200
    200+132=200+169=369
    369+122=369+144=513
    513+112=513+121=634.
  5. 5, 17, 53, ?, 485,
    190
    136
    142
    161
    None
    Option D
    Solution:
    5*3+2=17
    17*3+2=53
    53*3+2=161
    161*3+2=485.
  6. 1, 2, 6, 21, ?
    54
    65
    88
    76
    None
    Option C
    Solution:
    (1+1)*1=2
    (2+1)*2=6
    (6+1)*3=21
    (21+1)*4=88.
  7. 3, 6, 4, ?, 5, 10
    16
    12
    8
    20
    None
    Option B
    Solution:
    3*2=6
    4*3=12
    5*2=10.
  8. 50, 60, ?, 97.5, 131.625
    66
    70
    75
    84
    None
    Option C
    Solution:
    50*1.2=60
    60*1.25=75
    75*1.3=97.5
    97.5*1.35=131.625.
  9. 300, 65, 18, 8.6, ?
    7.5
    7.28
    8.52
    6.72
    None
    Option D
    Solution:
    300/5+5=65
    65/5+5=18
    18/5+5=8.6
    8.6/5+5=6.72.
  10. 11, 15, ?, 67, 131
    25
    32
    36
    31
    None
    Option D
    Solution:
    11+22=15
    15+42=31
    31+62=67
    67+82=131.



 

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