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Quantitative Aptitude

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Sequence and Series

Question
14 out of 30
 

Find out missing number.


8, 9, 8, 7, 10, 9, 6, 11, 10, ?, 12



A 5
B 7
C 8
D 11
E None of these

Ans. A 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

Clearly, I consists of consecutive numbers in decreasing order. So, the missing term is 5.

Sequence and Series Flashcard List

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