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Series Completion

Directions to SolveChoose the correct alternative that will continue the same pattern and replace the question mark in the given series.
Q1:

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

A 10, 10

B 10, 11

C 13, 14

D 13, 16

ANS:A - 10, 10

Explanation: 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.



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