This Article consist of most important questions of ” Series Completion ” topic that are mostly asked in all competitive exams. We collected these questions from the students who appeared in exams. Now try to solve these questions.
Series Completion Questions and Answers
Question : 1 125,80,45,20,?
A. 5
B. 8
C. 10
D. 12
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Correct Answer : A
Explanation :
The pattern is – 45, – 35, – 25, …..
So, missing term = 20 – 15 = 5.
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Question : 2 In the series 2, 6, 18, 54, …… what will be the 8th term ?
A. 4370
B. 4374
C. 7443
D. 7434
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Correct Answer : B
Explanation :
Clearly, 2 x 3 = 6, 6 x 3 = 18, 18 x 3 = 54,…..
So, the series is a G.P. in which a = 2, r = 3.
Therefore 8th term = ar8-1 = ar7 = 2 x 37 = (2 x 2187) = 4374.
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Question : 3 3, 10, 101,?
A. 10101
B. 10201
C. 10202
D. 11012
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Correct Answer : C
Explanation :
Each term in the series is obtained by adding 1 to the square of the preceding term.
So, missing term = (101)2 + 1 = 10202
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Question : 4 589654237, 89654237, 8965423, 965423, ?
A. 58965
B. 65423
C. 89654
D. 96542
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Correct Answer : D
Explanation :
The digits are removed one by one from the beginning and the end in order alternately
so as to obtain the subsequent terms of the series.
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Question : 5 120, 99, 80, 63, 48, ?
A. 35
B. 38
C. 39
D. 40
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Correct Answer : A
Explanation :
The pattern is – 21, – 19, – 17, – 15,…..
So, missing term = 48 – 13 = 35.
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