Quantitative Aptitude: Number Series Set 16

Number Series Questions Solutions for Bank PO, Insurance and SSC Exams.

Directions: What will come in place of (?) in following Number series following a certain pattern?

1. 2, 6, 16, 40, 96, ?
   A) 224
   B) 204
   C) 211
   D) 235
   E) 253
   
   View Answer

   Option A
   Pattern:
   2 × 2 + 2 = 6,
   6 × 2 + 4 = 16,
   16 × 2 + 8 = 40,
   40 × 2 + 16 = 96
   96 × 2 + 32 = 224
2. 21, 10, 9, 12, 22, ?
   A) 55.5
   B) 64.5
   C) 54.5
   D) 52.5
   E) 68.5
   
   View Answer

   Option D
   Pattern:  
   21 × 0.5 – 0.5 = 10,
   10 × 1 – 1 = 9,
   9 × 1.5 – 1.5 = 12,
   12 × 2 – 2 = 22,
   22 × 2.5 – 2.5 = 52.5
   
3. 15, 29, 27, 53, 51, ?
   A) 112
   B) 101
   C) 114
   D) 120
   E) 132
   
   View Answer

   Option B
   Pattern:
   15 × 2 – 1 = 29,
   29 × 1 – 2 = 27,
   27 × 2 – 1 = 53,
   53 × 1 – 2 = 51,
   51 × 2 – 1 = 101
4. 3, 3, 6, 18, 84, ?
   A) 555
   B) 405
   C) 235
   D) 696
   E) 485
   
   View Answer

   Option D
   Pattern:
   3 × 0.5 + 1.5 = 3,
   3 × 1 + 3 = 6,
   6 × 2 + 6 = 18,
   18 × 4 + 12 = 84,
   84 × 8 + 24 = 696   
5. 22, 12, 8, 21, 26, ?
   A) 95
   B) 90
   C) 40
   D) 58
   E) 63
   
   View Answer

   Option B
   Pattern:
   22 * 0.5 + 1²  = 12
   12 * 1 – 2²  = 8
   8 * 1.5 + 3²  = 21
   21 * 2 – 4²  = 26
   26 * 2.5 + 5² = 90
6. 4, 6, 24, 130, 924, ?
   A) 7125
   B) 6129
   C) 5257
   D) 8334
   E) 3652
   
   View Answer

   Option D
   Pattern:
   *1 + 2, *3 + 6, *5 + 10, *7 + 14, *9 + 18
7. 26, 13, 20, 51, 180, ?
   A) 812
   B) 728
   C) 731
   D) 624
   E) 835
   
   View Answer

   Option A
   Pattern:
   *0.5 + 0, *1.5 + 0.5, *2.5 + 1, *3.5 + 1.5, *4.5 + 2
8. 15, 28, 87, 344, 1725, ?
   A) 10376
   B) 10324
   C) 10344
   D) 10402
   E) 10444
   
   View Answer

   Option C
   Pattern:
   *2 – 2, *3 + 3, *4 – 4, *5 + 5, *6 – 6
   
9. 5, 6, 7.5, 9.75, ?, 18.4275
   A) 15.3525
   B) 13.1625
   C) 14.9125
   D) 14.4725
   E) 15.2225
   
   View Answer

   Option B
   Pattern:
   *1.2, *1.25, *1.3, *1.35, *1.4
10. 56, 60, 51, 67, 42, ?
    A) 70
    B) 88
    C) 53
    D) 62
    E) 78
    
    View Answer

    Option E
    Pattern:
    + 2², – 3², + 4², – 5², + 6²