Series Completion Interview Questions and Answers
Question - 51 : - 5760, 960, ?, 48, 16, 8
A. 120
B. 160
C. 192
D. 240
Answer - 51 : -
Option C
Explanation:
The pattern is ÷ 6, ÷ 5, ÷ 4, ÷ 3, ÷ 2.
So, missing term = 960 - 5 = 192.
Question - 52 : - 1, 2, 6, 7, 21, 22, 66, 67, ?
A. 70
B. 134
C. 201
D. 301
Answer - 52 : -
Option C
Explanation:
The pattern is + 1, x 3, + 1, x 3, + 1, x 3, + 1,.....
So, missing term = 67 x 3 = 201.
Question - 53 : - 0.5, 0.55, 0.65,0.8,?
A. 0.9
B. 0.82
C. 1
D. 0.95
Answer - 53 : -
Option C
Explanation:
The pattern is + 0.05, + 0.10, + 0.15,.....
So, missing term = 0.8 + 0.20 = 1.
Question - 54 : - 0, 2, 3, 5, 8, 10, 15, 17, 24, 26, ?
A. 28
B. 30
C. 32
D. 35
Answer - 54 : -
Option D
Explanation:
The given sequence is a combination of two series :
I. 0, 3, 8, 15, 24, ? and II. 2, 5, 10, 17, 26
The pattern in each one of I and II is + 3, + 5, + 7, + 9, .....
So, missing term = 24 + 11 = 35.
Question - 55 : - 11, 13, 17, 19, 23, 25, ?
A. 26
B. 27
C. 29
D. 37
Answer - 55 : -
Option C
Explanation:
The pattern is + 2, + 4, + 2, + 4, .....
So, missing term = 25 + 4 = 29.
Question - 56 : - 5, 2, 7, 9, 16, 25, ?
A. 41
B. 45
C. 48
D. 52
Answer - 56 : -
Option A
Explanation:
Each term in the series, except the first two terms, is the sum of the preceding two
terms.
So, missing term = 16 + 25 = 41.
Question - 57 : - 6, 13,28,59,?
A. 111
B. 113
C. 114
D. 122
Answer - 57 : -
Option D
Explanation:
The pattern is x 2 + 1, x 2 + 2, x 2 + 3,.....
So, missing term = 59 x 2 + 4 = 122.
Question - 58 : - 4, 12, 36, 108, ?
A. 144
B. 216
C. 304
D. 324
Answer - 58 : -
Option D
Explanation:
The pattern is x 3.
So, missing term = 108 x 3 = 324.
Question - 59 : - Which term of the series 5, 8, 11, 14,.....is 320?
A. 104th
B. 105th
C. 106th
D. 64th
Answer - 59 : -
Option C
Explanation:
Clearly, 5 + 3 = 8, 8 + 3 = 11, 11 + 3 = 14, .....
So, the series is an A.P. in which a - 5 and d = 3.
Let 320 be the nth term of the series.
Then, 320 = 5 + (n - 1) x 3 or (n - 1) = 105 or n = 106.
Question - 60 : - 8, 9, 8, 7, 10, 9, 6, 11, 10, ?, 12
A. 5
B. 7
C. 8
D. 11
Answer - 60 : -
Option A
Explanation:
The given sequence is a combination of three series :
I. 1st, 4th, 7th, 10th terms i.e. 8, 7, 6, ?
II. 2nd, 5th, 8th, 11th terms i.e. 9, 10, 11, 12
III. 3rd, 6th, 9th terms i.e. 8, 9, 10 The pattern in I is - 1.
So, missing term = 6 - 1 = 5.