Quantitative Aptitude: Number Series Set 92

Directions(1-10): What will be the approximate value of “?” in the following questions.

1. 226,346,?,654,846,1066
   488
   444
   432
   445
   420
   Option A
   11^2-1
   12^2-2
   13^2-3
   14^2-4
   15^2-5
   ? = 488

    

2. 26,104,?,832,1664,6656
   202
   205
   208
   220
   210
   Option C
   *4
   *2
   *4
   *2
   *4
   ? = 208

    

3. 3,732,?,1587,1803,1923
   1025
   1414
   1335
   1244
   1440
   Option D
   9^3
   8^3
   7^3
   6^3
   5^3
   ? = 1244

    

4. 8,?,1322,1541,1650.5,1705.25
   884
   800
   745
   820
   755
   Option A
   +876
   +438
   +219
   +109.5
   +54.75
   ? = 884

    

5. 136,748,3366,?,29452.5,44178.75
   14125
   11781
   10258
   12045
   13326
   Option B
   *5.5
   *4.5
   *3.5
   *2.5
   *1.5
   ? = 11781

    

6. 15,30,50,80,130,220
   269
   235
   244
   220
   274
   Option D
   Double difference +15,+20,+30,+50,+90
   +5,+10,+20,+40
   ? = 220

    

7. 9,6,9,24,108,?
   875
   850
   844
   891
   888
   Option E
   *0.5+1.5
   *1+3
   *2+6
   *4+12
   *8+24
   ? = 888

    

8. 48,24,72,18,90,?
   15
   12
   10
   9
   8
   Option A
   /2
   *3
   /4
   *5
   /6
   ? = 15

    

9. 7,10,18,42,90,?
   220
   205
   201
   210
   218
   Option D
   Difference
   3 = 2^2 – 1
   8 = 3^2 – 1
   24 = 5^2 – 1
   48 = 7^2 – 1
   120 = 11^2 – 1
   ? = 210

    

10. 1511,302,75,24,?,5
    5
    4
    8
    6
    10
    Option E
    (1511-1)/5
    (302-2)/5
    (75-3)/5
    (24-4)/5
    (10-5)/5
    ? = 10