Aptitude Questions: Number Series Set 47

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 wrong number in the series.

1. 2, 8, 12, 27, 58, 121
   A. 8
   B. 12
   C. 27
   D. 58
   E. 121
   

   Answer & Explanation

   Answer – A. 8
   Explanation :
   Wrong Number: 8
   Correct Number: 5
   
   
   
2. 895, 870, 821, 740, 619, 445
   A. 895
   B. 870
   C. 821
   D. 619
   E. 445
   

   Answer & Explanation

   Answer – E. 445
   Explanation :
   Wrong Number: 445
   Correct Number: 450
   
   
3. 664, 320, 150, 67, 28, 9.75
   A. 664
   B. 150
   C. 67
   D. 28
   E. 150
   

   Answer & Explanation

   Answer – D. 28
   Explanation :
   Wrong Number: 28
   Correct Number: 27.50
   
   
4. 8, 13, 9, 11, 10, 15
   A. 8
   B. 13
   C. 11
   D. 10
   E. 15
   

   Answer & Explanation

   Answer – C. 11
   Explanation :
   Wrong Number: 11
   Correct Number: 14
   
   
5. 16, 9, 8, 13, 25, 64
   A. 64
   B. 9
   C. 13
   D. 8
   E. 16
   

   Answer & Explanation

   Answer – A. 64
   Explanation :
   Wrong Number: 64
   Correct Number: 63.5
   16 * 0.5 + 1 = 9
   9 * 1 – 1 = 8
   8 * 1.5 + 1 = 13
   
   
6. 12, 13, 24, 75, 296, 1480
   A. 13
   B. 296
   C. 24
   D. 1485
   E. 12
   

   Answer & Explanation

   Answer – D. 1485
   Explanation :
   Wrong Number: 470
   Correct Number: 465
   12 * 1 + 1 = 13
   13 * 2 – 2 = 24
   24 * 3 + 3 = 75
   75 * 4 – 4 = 296
   296 * 5 + 5 = 1485
   
   
7. 11, 13, 16, 33, 100, 353
   A. 13
   B. 33
   C. 16
   D. 353
   E. 100
   

   Answer & Explanation

   Answer – E. 100
   Explanation :
   Wrong Number: 100
   Correct Number: 96
   11 + 1² + 1= 13
   13 + 2² – 1= 16
   16 + 4² + 1= 33……..
   
   
8. 4, 20, 120, 595, 2376 7125 
   A. 7125
   B. 120
   C. 20
   D. 595
   E. 2376
   

   Answer & Explanation

   Answer – C. 20
   Explanation :
   Wrong Number: 20
   Correct Number: 21
   4*7 -7 = 21
   21*6 -6 = 120
   120*5 -5 = 595.
   
   
9. 64, 60, 75, 103, 168, 294
   A. 64
   B. 60
   C. 75
   D. 294
   E. 103
   

   Answer & Explanation

   Answer – B. 60
   Explanation :
   Wrong Number: 60
   Correct Number: 66
   64 + (1³ + 1) = 66
   66 + (2³ + 1) = 75
   75 + (3³ + 1) = 103
   
   
10. 13, 25, 39, 50, 83, 125
    A. 39
    B. 25
    C. 125
    D. 13
    E. 50
    

    Answer & Explanation

    Answer – E. 50
    Explanation :
    Wrong Number: 50
    Correct Number: 57
    13*2 – 1 = 25
    25*2 – 11 = 39
    39*2 – 21 = 57