Logical Reasoning :: Number Series Test - 3

1.Look at this series: 80, 10, 70, 15, 60, ... What number should come next?

1. 10
2. 20
3. 5
4. 36

... Answer is 2)
This is an alternating addition and subtraction series. In the first pattern, 10 is subtracted from each number to arrive at the next. In the second, 5 is added to each number to arrive at the next.

2.Look at this series: 2, 6, 18, 54, ... What number should come next?

1. 888
2. 524
3. 216 4. 162

... Answer is 4)
This is a simple multiplication series. Each number is 3 times more than the previous number.

3.Look at this series: 5.2, 4.8, 4.4, 4, ... What number should come next?

1. 3
2. 3.6
3. 3.1
4. None of Above

... Answer is 2)
In this simple subtraction series, each number decreases by 0.4.

4.Look at this series: 8, 6, 9, 23, 87 , ... What number should come next?

1. 222
2. 314
3. 429
4. 666

... Answer is 3)
8 x 1 - 2 = 6 6 x 2 - 3 = 9 9 x 3 - 4 = 23 23 x 4 - 5 = 87 87 x 5 - 6 = 429 ...

5.Look at this series: 14, 28, 20, 40, 32, 64, ... What number should come next?

1. 56
2. 66
3. 14
4. None of Above

... Answer is 1)
Explanation: This is an alternating multiplication and subtracting series: First, multiply by 2 and then subtract 8.

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