Exercise: Number Series

Questions for: Number Series

Look at this series: 8, 22, 8, 28, 8, ... What number should come next?
A:
9
B:
29
C:
32
D:
34
Answer: D
This is a simple addition series with a random number, 8, interpolated as every other number. In the series, 6 is added to each number except 8, to arrive at the next number.
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Look at this series: 3, 4, 7, 8, 11, 12, ... What number should come next?
A:
7
B:
10
C:
14
D:
15
Answer: D
This alternating addition series begins with 3; then 1 is added to give 4; then 3 is added to give 7; then 1 is added, and so on.
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Look at this series: 58, 52, 46, 40, 34, ... What number should come next?
A:
26
B:
28
C:
30
D:
32
Answer: B
This is a simple subtraction series. Each number is 6 less than the previous number.
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Look at this series: 21, 9, 21, 11, 21, 13, 21, ... What number should come next?
A:
14
B:
15
C:
21
D:
23
Answer: B
In this alternating repetition series, the random number 21 is interpolated every other number into an otherwise simple addition series that increases by 2, beginning with the number 9.
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Look at this series: 53, 53, 40, 40, 27, 27, ... What number should come next?
A:
12
B:
14
C:
27
D:
53
Answer: B
In this series, each number is repeated, then 13 is subtracted to arrive at the next number.
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