Number Series Interview Questions and Answers
Question - 21 : - Look at this series: 14, 28, 20, 40, 32, 64, ... What number should come next?
A. 52
B. 56
C. 96
D. 128
Answer - 21 : -
B) 56
Explanation:
This is an alternating multiplication and subtracting series: First, multiply by 2 and then subtract 8.
Question - 22 : - Look at this series: 2, 4, 6, 8, 10, ... What number should come next?
A. 11
B. 12
C. 13
D. 14
Answer - 22 : -
B) 12
Explanation:
This is a simple addition series. Each number increases by 2.
Question - 23 : - Look at this series: 201, 202, 204, 207, ... What number should come next?
A. 205
B. 208
C. 210
D. 211
Answer - 23 : -
D ) 211
Explanation:
In this addition series, 1 is added to the first number; 2 is added to the second number; 3 is added to the third number; 4 is added to the fourth number; and go on.
Question - 24 : - Look at this series: 544, 509, 474, 439, ... What number should come next?
A. 404
B. 414
C. 420
D. 445
Answer - 24 : -
A) 404
Explanation:
This is a simple subtraction series. Each number is 35 less than the previous number.
Question - 25 : - Look carefully for the pattern, and then choose which pair of numbers comes next.
28 25 5 21 18 5 14
A. 11 5
B. 10 7
C. 11 8
D. 5 10
E. 10 5
Answer - 25 : -
A) 11.5
Explanation:
This is an alternating subtraction series with the interpolation of a random number, 5, as every third number. In the subtraction series, 3 is subtracted, then 4, then 3, and so on.
Question - 26 : - Look carefully for the pattern, and then choose which pair of numbers comes next.
8 11 21 15 18 21 22
A. 25 18
B. 25 21
C. 25 29
D. 24 21
E. 22 26
Answer - 26 : -
B
Explanation:
This is an alternating addition series, with a random number, 21, interpolated as every third number. The addition series alternates between adding 3 and adding 4. The number 21 appears after each number arrived at by adding 3.
Question - 27 : - Look carefully for the pattern, and then choose which pair of numbers comes next.
9 16 23 30 37 44 51
A. 59 66
B. 56 62
C. 58 66
D. 58 65
E. 54 61
Answer - 27 : -
D
Explanation:
Here is a simple addition series, which begins with 9 and adds 7.
Question - 28 : - 2 8 14 20 26 32 38
A. 2 46
B. 44 50
C. 42 48
D. 40 42
E. 32 26
Answer - 28 : -
B
Explanation:
This is a simple addition series, which begins with 2 and adds 6.
Question - 29 : - Look carefully for the pattern, and then choose which pair of numbers comes next.
9 11 33 13 15 33 17
A. 19 33
B. 33 35
C. 33 19
D. 15 33
E. 19 21
Answer - 29 : -
A
Explanation:
In this alternating repetition series, a random number, 33, is interpolated every third number into a simple addition series, in which each number increases by 2.
Question - 30 : - Look carefully for the pattern, and then choose which pair of numbers comes next.
11 16 21 26 31 36 41
A. 47 52
B. 46 52
C. 45 49
D. 46 51
Answer - 30 : -
Option D
Explanation:
In this simple addition series, each number is 5 more than the previous number.