Series Completion

Question: In the series 10, 17, 24, 31, 38,…..which of the following will be a number of the series ?
[A].

48

[B].

346

[C].

574

[D].

1003

Answer: Option B

Explanation:

The given series consists of numbers each of which, on dividing by 7, leaves a

remainder 3. No other number except 346 satisfies the property.

Question: 90, 180, 12, 50, 100, 200, ?, 3, 50, 4, 25, 2, 6, 30, 3
[A].

150

[B].

175

[C].

225

[D].

250

Answer: Option A

Explanation:

Clearly, 90 = 30 x 3, 180 = 6 x 30, 12 = 2 x 6, 50 = 25 x 2, 100 = 4 x 25, 200 = 50 x 4.

So, missing term = 3 x 50 = 150.

Question: 8, 9, 8, 7, 10, 9, 6, 11, 10, ?, 12
[A].

5

[B].

7

[C].

8

[D].

11

Answer: Option A

Explanation:

The given sequence is a combination of three series :

I. 1st, 4th, 7th, 10th terms i.e. 8, 7, 6, ?

II. 2nd, 5th, 8th, 11th terms i.e. 9, 10, 11, 12

III. 3rd, 6th, 9th terms i.e. 8, 9, 10 The pattern in I is – 1.

So, missing term = 6 – 1 = 5.

Question: 8, 28, 116, 584, ?
[A].

1752

[B].

3502

[C].

3504

[D].

3508

Answer: Option D

Explanation:

The pattern is x 3 + 4, x 4 + 4, x 5 + 4,…..

So, missing term = 584 x 6 + 4 = 3508.

Question: 9, 27, 31, 155, 161, 1127, ?
[A].

316

[B].

1135

[C].

1288

[D].

2254

Answer: Option B

Explanation:

The pattern is x 3, + 4, x 5, + 6, x 7,…..

So, missing term = 1127 + 8 = 1135.