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Aptitude Questions: Number Series Set 47

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