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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.

31.
66, 36, 18, ?
3
6
8
9
Answer: Option
Explanation:

Each term in the series is the product of the digits of the preceding term.

So, missing term = 1 x 8 = 8.

32.
In the series 3, 9, 15, ...... what will be the 21st term?
117
121
123
129
Answer: Option
Explanation:

Clearly, 3 + 6 = 9, 9 + 6 = 15,.....

So, the series is an A.P. in which a = 3 and d = 6.

Therefore 21st term = a + (21 - 1) d = a + 20d = 3 + 20 x 6 = 123.

33.
28, 33, 31, 36, ?, 39
32
34
38
40
Answer: Option
Explanation:

The pattern is + 5, - 2, + 5, - 2,.....

So, missing term = 36 - 2 = 34.

34.
1, 9, 25, 49, 81, ?
100
112
121
144
Answer: Option
Explanation:

The series consists of squares of consecutive odd numbers

i.e. 12, 32, 52, 72, 92,.....

So, missing term = 112 = 121.

35.
1, 9, 25, 49, ?, 121
64
81
91
100
Answer: Option
Explanation:

The given series consists of squares of consecutive odd numbers

i.e. 12, 32, 52, 72,.....

So, missing term = 92 = 81.

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