Verbal Reasoning - Series Completion

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

1. 

1, 1, 2, 6, 24, ?, 720

A. 100
B. 104
C. 108
D. 120

Answer: Option D

Explanation:

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

So, missing term = 24 x 5 = 120.


2. 

2, 15, 4, 12, 6, 7, ?, ?

A. 8, 8
B. 8, 0
C. 3, 8
D. None of these

Answer: Option B

Explanation:

Let the missing terms of the series be x1 and x2.

Thus, the sequence 2, 15, 4, 12, 6, 7, x1 x2 is a combination of two series :

I. 2, 4, 6, x1 and II. 15, 12, 7, x2I consists of consecutive even numbers.

So, missing term, x1 = 8.

The pattern in II is - 3, - 5,......So, missing term, x2 = 7 - 7 = 0.


3. 

4832, 5840, 6848, ?

A. 7815
B. 7846
C. 7856
D. 7887

Answer: Option C

Explanation:

The pattern is + 1008.

So, missing term - 6848 + 1008 = 7856.


4. 

5824, 5242, ?, 4247, 3823

A. 4467
B. 4718
C. 4856
D. 5164

Answer: Option B

Explanation:

Each term in the series is obtained by subtracting from the preceding term the number

formed by the first three digits of the preceding term.

So, missing term = 5242 - 524 = 4718.


5. 

2, 8, 16, 128, ?

A. 2042
B. 2046
C. 2048
D. 2056

Answer: Option C

Explanation:

Each term in the series, except the first two terms, is the product of the preceding two terms.

So, missing term = 16 x 128 = 2048.