Series Completion Interview Questions and Answers
Question - 41 : - 2, 1, 2, 4, 4, 5, 6, 7, 8, 8, 10, 11, ?
A. 9
B. 10
C. 11
D. 12
Answer - 41 : -
Option B
Explanation:
The given sequence is a combination of three series :
I. 1st, 4th, 7th, 10th, 13th terms i.e. 2, 4, 6, 8, ?
II. 2nd, 5th, 8th, 11th terms i.e. 1, 4, 7, 10
III. 3rd, 6th, 9th, 12th terms i.e. 2, 5, 8, 11
Clearly, I consists of consecutive even numbers. So, the missing term is 10.
Question - 42 : - Which of the following will not be a number of the series 1, 8, 27, 64, 125,.....?
A. 256
B. 512
C. 729
D. 1000
Answer - 42 : -
Option A
Explanation:
The given series consists of cubes of natural numbers only. 256 is not the cube of
any natural number.
Question - 43 : - Choose the correct alternative that will continue the same pattern and replace the question mark in the given series.
1, 1, 2, 6, 24, ?, 720
A. 100
B. 104
C. 108
D. 120
Answer - 43 : -
Option D
Explanation:
The pattern is x 1, x 2, x 3, x 4,.....
So, missing term = 24 x 5 = 120.
Question - 44 : - 4832, 5840, 6848, ?
A. 7815
B. 7846
C. 7856
D. 7887
Answer - 44 : -
Option C
Explanation:
The pattern is + 1008.
So, missing term - 6848 + 1008 = 7856.
Question - 45 : - 5824, 5242, ?, 4247, 3823
A. 4467
B. 4718
C. 4856
D. 5164
Answer - 45 : -
Option B
Explanation:
Each term in the series is obtained by subtracting from the preceding term the number
formed by the first three digits of the preceding term.
So, missing term = 5242 - 524 = 4718.
Question - 46 : - 2, 8, 16, 128, ?
A. 2042
B. 2046
C. 2048
D. 2056
Answer - 46 : -
Option C
Explanation:
Each term in the series, except the first two terms, is the product of the preceding two terms.
So, missing term = 16 x 128 = 2048.
Question - 47 : - 4, 10, ?, 82, 244, 730
A. 24
B. 28
C. 77
D. 218
Answer - 47 : -
Option B
Explanation:
Each number in the series is 2 less than thrice the preceding number.
So, missing number = (10 x 3) - 2 = 28.
Question - 48 : - 1, 5, 13,25,41,?
A. 51
B. 57
C. 61
D. 63
Answer - 48 : -
Option C
Explanation:
The pattern is + 4, + 8, + 12, + 16......
So, missing term = 41 + 20 = 61.
Question - 49 : - 325, 259, 204, 160, 127, 105, ?
A. 94
B. 96
C. 98
D. 100
Answer - 49 : -
Option A
Explanation:
The pattern is - 66, - 55, - 44, - 33, - 22, .....
So, missing term = 105 - 11 = 94.
Question - 50 : - 4, 7, 12, 19, 28, ?
A. 30
B. 36
C. 39
D. 49
Answer - 50 : -
Option C
Explanation:
The pattern is + 3, + 5, + 7, + 9, .....
So, missing term = 28 + 11 = 39.