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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.

41.
2,3,8,27, 112,?
226
339
452
565
Answer: Option
Explanation:

The pattern is x 1 + 1, x 2 + 2, x 3 + 3, x 4 + 4,.....

So, missing term = 112 x 5 + 5 = 565.

42.
6, 17, 39, 72, ?
83
94
116
127
Answer: Option
Explanation:

The pattern is + 11, + 22, + 33, .....

So, missing term = 72 + 44 = 116.

43.
20, 20, 19, 16, 17, 13, 14, 11, ?, ?
10, 10
10, 11
13, 14
13, 16
Answer: Option
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.

44.
24, 60, 120, 210, ?
300
336
420
525
Answer: Option
Explanation:

The pattern is + 36, + 60, + 90,.....i.e. + [6 x (6 + 0)], + [6 x (6 + 4)], + [6 x (6 + 9)],...

So, missing term = 210 + [6 x (6 + 15)] = 210 + 126 = 336.

45.
625, 5, 125, 25, 25, ?, 5
5
25
125
625
Answer: Option
Explanation:

The given sequence is a combination of two series :

I. 625, 125, 25, 5 and II. 5, 25, ?

The pattern in I is ÷ 5, while that in II is x 5. So, missing term = 25 x 5 = 125.

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