Quantitative Aptitude: Number Series Set 77

Directions: The following series are based on a certain pattern. One of the number in series is wrong. Find that odd one out.

  1. 5, 19, 61, 190, 565, 1699
    61
    565
    190
    1699
    19
    Option C
    Solution:
    5*3+4=19
    19*3+4=61
    61*3+4=187
    187*3+4=565
    565*3+4=1699.
  2. 10, 6, 12, 35, 131.5, 591.75
    35
    591.75
    12
    131.5
    6
    Option D
    Solution:
    10*0.5+1=6
    6*1.5+3=12
    12*2.5+5=35
    35*3.5+7=129.5
    129.5*4.5+9=527
  3. 6, 11, 4, 13, 5, 15
    5
    11
    15
    13
    4
    Option A
    Solution:
    6+5=11
    11-7=4
    4+9=13
    13-11=2
    2+13=15.
  4. 8, 6, 2, 1, 0.5, 0.25
    0.5
    6
    1
    2
    0.25
    Option B
    Solution:
    8/4*2=4
    4/4*2=2
    2/4*2=1
    1/4*2=0.5
    0.5/4*2=0.25.
  5. 1, 5, 72, 105, 617, 717
    717
    5
    72
    105
    617
    Option C
    Solution:
    1+ 22=5
    5+43=69
    69+62=105
    105+83=617
    617+102=717.
  6. 729, 81, 243, 35, 81, 9
    243
    35
    81
    9
    None
    Option B
    Solution:
    729/9=81
    81*3=243
    243/9=27
    27*3=81
    81/9=9.
  7. 8, 12.5, 23, 35, 53, 75.5
    23
    35
    12.5
    75.5
    53
    Option A
    Solution:
    8+4.5=12.5
    12.5+9=21.5
    21.5+13.5=35
    35+18=53
    53+22.5=75.5.
  8. 196, 168, 143, 120, 99, 80
    99
    80
    143
    196
    None
    Option D
    Solution:
    195 ……… 168……… 143……… 120……… 99……… 80
    ……… 27……… 25……… 23……… 21……… 19.
  9. 3, 5, 14, 48, 200, 1015
    14
    48
    1015
    200
    5
    Option C
    Solution:
    3*1+2=5
    5*2+4=14
    14*3+6=48
    48*4+8=200
    200*5+10=1010.
  10. 2, 6, 30, 96, 285, 568
    285
    96
    6
    30
    568
    Option D
    Solution:
    2*6-6=6
    6*5-5=25
    25*4-4=96
    96*3-3=285
    285*2-2=568.



 

Related posts

Leave a Comment