Quantitative Aptitude: Number Series Set 116

Find what comes in the question mark.

1. 0.8.. 3.8.. 12.6.. 44.8..?
   
   188.2
   180.2
   88.2
   198.2
   168.2
   Option A
   0.8 × 1 + 3 = 3.8
   3.8 × 2 + 5 = 12.6
   12.6 × 3 + 7 = 44.8
   44.8 × 4 + 9 = 188.2
   
   
    



2. 33 .. 110.. 453.. 2282.. ?
   
   13711
   12467
   12345
   13423
   15672
   Option A
   13 × 2 + 7 = 33
   33 × 3 + 11 = 110
   110 × 4 + 13 = 453
   453 × 5 + 17 = 2282
   2282 × 6 + 19 = 13711
   
   
    



3. 664.. 334.. 85.5.. ?.. 4.03125 ..
   
   16
   15
   25.25
   16.25
   15.25
   Option D
   664 + 4 ÷ 2 = 334
   334 + 8 ÷ 4 = 85.5
   85.5 + 12 ÷ 6 = 16.25
   16.25 + 16 ÷ 8 = 4.03125
   
   
   
    



4. 1 .. 3.. 7.. 13.. 22.. ? ..
   
   30
   34
   21
   31
   33
   Option
   1 + 1 + 1 = 3
   3 + 2 + 2 = 7
   7 + 3 + 3 = 13
   13 + 4 + 5 = 22
   22 + 5 + 7 = 34
   
   
    



5. 5 .. 41.. 321.. 1921.. ?..
   
   7681
   Option
   5 × 10 – 9 = 41
   41 × 8 – 7 = 321
   321 × 6 – 5 = 1921
   1921 × 4 – 3 = 7681
   
   
    



6. 384.. 381.. 372.. 345.. ?
   
   100
   101
   102
   103
   104
   Option C
   -3, -9, -27 ,-81 -243, ….
   
   
    



7. 12.. 14.. 32.. 102 ..?..
   
   Option
   clue: ×1 + 2, ×2 + 4, ×3 + 6, ×4 + 8, ×5 + 10
   
   
    



8. 841.. 961... 1089.. ?.. 1369 ..
   
   1225
   1125
   1325
   1432
   1200
   Option A
   clue: +120, +128, +136, +…. +160, ….
   
   
    



9. 1108.. 1117.. 1142.. 1191 .. ?..
   
   Option
   clue: +3^2, +5^2, +7^2, +11^2, +13^2,….
   
   
    



10. 529.. 841.. 961.. ? .. 1681
    
    1432
    1345
    1234
    1369
    1145
    Option
    clue:square of prime numbers from 23