Series Completion Interview Questions and Answers
Question - 81 : - 10, 14, 28, 32, 64, 68, 132
A. 28
B. 32
C. 64
D. 132
Answer - 81 : -
Option D
Explanation:
The correct pattern is + 4, x 2, + 4, x 2, .....
So, 132 is wrong and must be replaced by (68 x 2) i.e. 136.
Question - 82 : - 46080, 3840, 384, 48, 24, 2, 1
A. 384
B. 48
C. 24
D. 2
Answer - 82 : -
Option C
Explanation:
The correct pattern is ÷ 12, ÷ 10, ÷ 8,÷ 6,.....
So, 24 is wrong and must be replaced by (48 + 6) i.e. 8.
Question - 83 : - 89, 78, 86, 80, 85, 82, 83
A. 83
B. 82
C. 86
D. 78
Answer - 83 : -
Option C
Explanation:
The correct pattern is - 11, + 9, - 7, + 5, - 3, + 1.
So, 86 is wrong and must be replaced by (78 + 9) i.e. 87.
Question - 84 : - 0, 2, 3, 5, 8, 10, 15, 18, 24, 26, 35
A. 18
B. 24
C. 26
D. 10
Answer - 84 : -
Option A
Explanation:
The given sequence is a combination of two series:
I. 0, 3, 8, 15, 24, 35 and II. 2, 5, 10, 18, 26
The pattern in both I and II is + 3, + 5, + 7, + 9,.....
So, in II, 18 is wrong and must be replaced by (10 + 7) i.e. 17.
Question - 85 : - 15, 16, 22, 29, 45, 70
A. 16
B. 22
C. 45
D. 70
Answer - 85 : -
Option B
Explanation:
The correct pattern is + 1, + 4, + 9, + 16, + 25 i.e. + 12, + 22, + 32, + 42, + 52.
So, 22 is wrong and must be replaced by (16 + 4) i.e. 20.
Question - 86 : - 8, 14, 26, 48, 98, 194, 386
A. 14
B. 48
C. 98
D. 194
Answer - 86 : -
Option B
Explanation:
The correct pattern is x 2 - 2.
So, 48 is wrong and must be replaced by (26 x 2 - 2) i.e. 50.
Question - 87 : - 3, 10, 27, 4, 16, 64, 5, 25, 125
A. 3
B. 4
C. 10
D. 27
Answer - 87 : -
Option C
Explanation:
The correct sequence is 3, 32, 33, 4, 42, 43, 5, 52, 53.
So, 10 is wrong and must be replaced by 32 i.e. 9.
Question - 88 : - 1, 5, 9, 15, 25, 37, 49
A. 9
B. 15
C. 25
D. 37
Answer - 88 : -
Option B
Explanation:
The terms of the given series are 12, (22 + 1), 32, (42..+ 1), 52, (62 + 1), 72.
So, 15 is wrong and must be replaced by (42 + 1) i.e. 17.
Question - 89 : - 4, 10, 22, 46, 96, 190, 382
A. 4
B. 10
C. 96
D. 382
Answer - 89 : -
Option C
Explanation:
The correct pattern is + 6, + 12, + 24, + 48, + 96, + 192.
So, 96 is wrong and must be replaced by (46 + 48) i.e. 94.
Question - 90 : - 325, 259, 202, 160, 127, 105, 94
A. 94
B. 127
C. 202
D. 259
Answer - 90 : -
Option C
Explanation:
The correct pattern is - 66, - 55, - 44, - 33, - 22, - 11.
So, 202 is wrong and must be replaced by (259 - 55) i.e. 204.