series completion test | reasoning
in this type of test some numbers and/or alphabetical letters are given. They all form a series and change in a certain order. Series has one or more letters or numbers missing. The candidates are required to observe that specific order in which the number or letters would suit for the blank space if they continue to change in the same order. in simple words test of completion of series. each questions have different decoded completion test of series.
it will be clarified from the following examples.
series completion test | reasoning examples
Example 1. which of the alternative figures would correctly fill in the blank space in the following series of numbers?
6,13,27,55,111, ___
(A) 225 (B) 224
(C) 223 (D)231
(E) 230
Answer with Explanation :- 13 is greater than the double of 6 by 1. similarly 27 is greater than the double of 13 by 1. 55 is greater than the double of 27 by 1. 111 is greater than the double of 55 by 1. thus, in blank space there would be 2*111+1= 223
Hence the correct answer is (C).
Example 2. which one of the letter groups given below would replace the question mark (?) in the letter series?
YCL, MQZ, AEN, ?
(A) OSB (B) PUE
(C) MPX (D) OTC
(E) PVF
Answer with explanation :- Last letter of the firs group is L and the first letter of second group is M. Here, M is the next letter of L in alphabet. Similarly the last letter of the second group is Z and the first letter of the third group is A. here A is the next letter of Z in alphabet. Therefore, the first letter of blank space should be the next letter of N, which is O. Besides, there is a gap of three letters between the first and second letters of each group. therefore, second letter of blank space should be fourth letter after O. i.e it should be S. in given alternatives only (A) is such alternative that has first letter as O and second as S. Hence (A) is the correct answer.
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