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Quantitative Aptitude

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Sequence and Series

Question
5 out of 30
 

Find out missing number.


20, 20, 19, 16, 17, 13, 14, 11, ?, ?



A 10, 10
B 10, 11
C 13, 14
D 13, 16
E None of these

Ans. A Let the missing terms of the series be x1 and x2.

Thus, the sequence 20, 20, 19, 16, 17, 13, 14, 11, xv x2 is a combination of two series :

I. 20, 19, 17, 14, x1 and II. 20, 16, 13, 11, x2

The pattern in I is - 1, - 2, - 3,......So, missing term, x1 = 14 - 4 = 10.

The pattern in II is - 4, - 3, - 2,......So, missing term, x2 = 11 - 1 = 10.

Sequence and Series Flashcard List

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