Aptitude Questions: Number Series Set 38

Hello Aspirants. Welcome to Online Quantitative Aptitude Section in AffairsCloud.com. Here we are creating question sample in Number Series, which is common for all the competitive exams. We have included Some questions that are repeatedly asked in bank exams !!!

Directions(1-10) : In these questions, a number series is given. Find out the missing number.

1. 14 8 6 6 7 ?
   A. 6.5
   B. 7.5
   C. 8.5
   D. 9.5
   E. None of these
   
   Answer & Explanation

   Answer – C. 8.5
   Explanation :
   14 / 2 + 1 = 8
   8 / 2 + 2 = 6
   6 / 2 + 3 = 6
   
   
2. 6 13 20 65 256 ? 
   A. 1283
   B. 1756
   C. 2786
   D. 2686
   E. None of these
   
   Answer & Explanation

   Answer – A. 1283
   Explanation :
   6 * 1 + 7 = 13
   13 * 2 – 6 = 20
   20 * 3 + 5 = 65….
   
   
3. 24 28 40 ? 88 124 
   A. 40
   B. 60
   C. 66
   D. 35
   E. None of these
   
   Answer & Explanation

   Answer – B. 60
   Explanation :
   24 + 4 = 28
   28 + 4*3 = 40
   40 + 4*5 = 60…..
   
   
4. 15 8 7 16 60 ?
   A. 362
   B. 488
   C. 388
   D. 364
   E. None of these
   
   Answer & Explanation

   Answer – B. 488
   Explanation :
   15 * 0.5 + 0.5 = 8
   8 * 1 – 1 = 7
   7 * 2 + 2 = 16; 16 * 4 – 4 = 60…
   
   
5. 19 23 40 70 113 ?
   A. 145
   B. 169
   C. 144
   D. 381
   E. None of these
   
   Answer & Explanation

   Answer – B. 169
   Explanation :
   23 – 19 = 4
   40 – 23 = 17
   70 – 40 = 30; 17 – 4 = 13; 30 – 17 = 13….
   
   
6. 12, 6.5, 7.5, 12.75, 27.5, ?
   A. 70.25
   B. 73.25
   C. 71.25
   D. 74.25
   E. None of these
   
   Answer & Explanation

   Answer – C. 71.25
   Explanation :
   12 * 0.5 + 0.5 = 6.5
   6.5 * 1 + 1 = 7.5
   7.5 * 1.5 + 1.5 = 12.75…..
   
   
7. 965 622 406 281 217 ?
   A. 170
   B. 180
   C. 190
   D. 160
   E. None of these
   
   Answer & Explanation

   Answer – C. 190
   Explanation :
   965 – 343 = 622
   622 – 216 = 406
   406 – 125 = 281…..
   
   
8. 18, 22, 35, 121, 459 ?
   A. 2331
   B. 2531
   C. 1509
   D. 1459
   E. None of these
   
   Answer & Explanation

   Answer – A. 2331
   Explanation :
   18 * 1 + 4 = 22; 22*2 – 9 = 35; 35*3 + 16 =121 ….
   
   
9. 10 66 325 1304 3909 ?
   A. 7850
   B. 7820
   C. 7460
   D. 7560
   E. None of these
   
   Answer & Explanation

   Answer – B. 7820
   Explanation :
   10 * 6 + 6 = 66
   66 * 5 – 5 = 325
   325 * 4 + 4  = 1304
   1304 * 3 – 3  = 3909….
   
   
10. 20, 119, 592, 2363, ?
    A. 7086
    B. 7082
    C. 7087
    D. 7085
    E. None of these
    
    Answer & Explanation

    Answer – B. 7082
    Explanation :
    20 * 6 – 1 = 119
    119 * 5 – 3 = 592
    592 * 4 – 5 = 2363
    2363 * 3 – 7 = 7082