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Number Series interview questions and answers

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Directions

Find out the missing numbers

1)
2, 9, 28, 65, ...... ?
  • 121
  • 195
  • 126
  • 103
  • 96
+ View Answer
  • Answer
  • c) 126
  • Explanation
  • Method used from the series is
    (1)3 + 1, (2)3 + 1, (3)3 + 1, (4)3 + 1, .....
    Therefore, the missing number is (5)3 + 1 = 126

2)
2, 6, 14, 26, ...., 62
  • 52
  • 54
  • 44
  • 42
  • 50
+ View Answer
  • Answer
  • d) 42
  • Explanation
  • 2 + 4 = 6
    6 + 8 = 14
    14 + 12 = 26
    26 + 16 = 42
    42 + 20 = 62
    The difference of each successive number is increased by 4. Hence, number 42 will fill up the blank space.

3)
100, 50, 52, 26, 28, ....., 16, 8
  • 30
  • 36
  • 14
  • 32
  • 12
+ View Answer
  • Answer
  • c) 14
  • Explanation
  • 2nd number is half of 1st number, 4th number is half of 3rd number and so on.

4)
4, 9, 20, 43, .....
  • 90
  • 84
  • 96
  • 95
  • None of these
+ View Answer
  • Answer
  • a) 90
  • Explanation
  • The series follows the method 4*2+1 = 9
    9*2+2 = 20
    20*2+3 = 43
    43*2+4 = 90.

5)
83, 82, 81, ....., 69, 60, 33
  • 73
  • 80
  • 75
  • 77
  • None of these
+ View Answer
  • Answer
  • d) 77
  • Explanation
  • Series has been written in reverse order with a difference of (1)2,(1)3,(2)2, (2)3, (3)2, (3)3
    i.e., 1,1,4,8,9,27