Logical Reasoning :: Number Series Test - 1

1.Look at this series: 2, 1, (1/2), (1/4), ... What number should come next?

1. (1/8)
2.(1/3)
3. (2/8)
4. (1/16)

... Answer is 1)
Explanation: This is a simple division series; each number is one-half of the previous number. In other terms to say, the number is divided by 2 successively to get the next result. 4/2 = 2 2/2 = 1 1/2 = 1/2 (1/2)/2 = 1/4 (1/4)/2 = 1/8 and so on.

2.Look at this series: 7, 10, 8, 11, 9, 12, ... What number should come next?

1.7
2. 12
3.10
4. 13

... Answer is 3)
Explanation: This is a simple alternating addition and subtraction series. In the first pattern, 3 is added; in the second, 2 is subtracted.

3.Look at this series: 36, 34, 30, 28, 24, ... What number should come next?

1. 20
2. 22
3.23
4. 26

... Answer is 2)
Explanation: This is an alternating number subtraction series. First, 2 is subtracted, then 4, then 2, and so on.

4.Look at this series: 22, 21, 23, 22, 24, 23, ... What number should come next?

1. 24
2. 22
3. 25
4. 26

... Answer is 3)
Explanation: In this simple alternating subtraction and addition series; 1 is subtracted, then 2 is added, and so on.

5. Look at this series: 53, 53, 40, 40, 27, 27, ... What number should come next?

1. 14
2. 12
3. 27
4. 53

... Answer is 1)
Explanation: In this series, each number is repeated, then 13 is subtracted to arrive at the next number.