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Verbal Reasoning - Series Completion

Exercise : Series Completion - Section 1
Directions to Solve

Choose the correct alternative that will continue the same pattern and replace the question mark in the given series.

6.
1, 1, 4, 8, 9, 27, 16, ?
32
64
81
256
Answer: Option
Explanation:

The series consists of squares and cubes of consecutive natural numbers i.e. 12, 13, 22, 23, 32, 33, 42, .....

So, missing term = 43 = 64.

7.
1, 2, 3, 6, 9, 18, ?, 54
18
27
36
81
Answer: Option
Explanation:

The pattern is x 2, x 3/2, x 2, x 3/2, x 2,.....

So, missing term = 18 x 3/2 = 27.

8.
6, 13, 25, 51, 101, ?
201
202
203
205
Answer: Option
Explanation:

The pattern is x 2 + 1, x 2 - 1, x 2 + 1, x 2 - 1,.....

So, missing term = 101 x 2 + 1 = 203.

9.
5, 6, 9, 15, ?, 40
21
25
27
33
Answer: Option
Explanation:

The pattern is + 1, + 3, + 6,....., i.e. + 1, + (1 + 2), + (1 + 2 + 3),.....

So, missing term = 15 + (1 + 2 + 3 + 4) = 25.

10.
1, 3, 4, 8, 15, 27, ?
37
44
50
55
Answer: Option
Explanation:

The sum of any three consecutive terms of the series gives the next term.

So, missing number = 8 + 15 + 27 = 50.

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