Aptitude Questions: Number Series Set 51

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 !!!

1. 12 42 156 606 2400 ?
   A. 9186
   B. 9470
   C. 9570
   D. 9486
   E. None of these
   
   Answer & Explanation

   Answer – C. 9570
   Explanation :
   (12 * 4) – 6 = 48 – 6 = 42
   (42 * 4) – 12 = 168 – 12 = 156
   (156 * 4) – 18 = 624 – 18 = 606
   (606 * 4) – 24 = 2424 – 24 = 2400
   (2400 * 4) – 54 = 9600 – 30 = 9570
   
   
2. 18 9 11 ? 109 544
   A. 34
   B. 28
   C. 24
   D. 14
   E. None of these
   
   Answer & Explanation

   Answer – B. 28
   Explanation :
   18*1 – 9 = 9
   9*2 – 7 = 11
   11*3 – 5 = 28
   
   
3. 14 26 62 122 206 ?
   A. 310
   B. 312
   C. 314
   D. 313
   E. None of these
   
   Answer & Explanation

   Answer – C. 314
   Explanation :
   14 + (1 * 12) = 14 + 12 = 26
   26 + (3 * 12) = 26 + 36 = 62
   62 + (5 * 12) = 62 + 60 = 122
   122 + (7 * 12) = 122 + 84 = 206
   206 + (9 * 12) = 206 + 108 = 314
   
   
   
4. 364 362 371 343 ? 282
   A. 402
   B. 404
   C. 406
   D. 408
   E. None of these
   
   Answer & Explanation

   Answer – D. 408
   Explanation :
   364 – 1³ + 1 = 362
   362 + 2³ + 1 = 371
   371 – 3³ + 1 = 343
   
   
5. 6 8 16 42 122 ?
   A. 364
   B. 366
   C. 362
   D. 361
   E. None of these
   
   Answer & Explanation

   Answer – A. 364
   Explanation :
   6 + 2 = 8
   8 + 8(= 3 * 2 + 2) = 16
   16 + 26(= 3 * 8 + 2) = 42
   42 + 80(= 3 * 26 + 2) = 122
   122 + 242(= 3 * 80 + 2) = 364
   
   
6. 15 44 121 342 ? 2944
   A. 976
   B. 995
   C. 973
   D. 978
   E. None of these
   
   Answer & Explanation

   Answer – B. 995
   Explanation :
   15*3 – 1 = 44
   44*3 – 11 = 121
   121*3 – 21 = 342
   
   
7. 61 49 57 41 45 ?
   A. 58
   B. 32
   C. 60
   D. 25
   E. None of these
   
   Answer & Explanation

   Answer – D. 25
   Explanation :
   
   
   
8. 6 12 72 ? 10080
   A. 720
   B. 816
   C. 879
   D. 980
   E. None of these
   
   Answer & Explanation

   Answer – A. 720
   Explanation :
   6 * (1 + 1) = 12
   12 * (3 + 3) = 72
   72 * (5 + 5) = 720
   720 * (7 + 7) = 10080
   
   
9. 5 6 14 45 ? 925
   A. 150
   B. 155
   C. 140
   D. 184
   E. None of these
   
   Answer & Explanation

   Answer – D. 184
   Explanation :
   (5*1)+1 = 6
   (6*2)+2 = 14
   (14*3)+3 = 45
   (45*4)+4 = 184
   
   
10. 2 12 36 80 150 ?
    A. 270
    B. 275
    C. 260
    D. 252
    E. None of these
    
    Answer & Explanation

    Answer – D. 252
    Explanation :
    1³ + 1², 2³ + 2², 3³ + 3², 4³ + 4²….