A sequence, in mathematics, is a string of objects, like numbers, that follow a particular pattern. The individual elements in a sequence are called terms. Some of the simplest sequences can be found in multiplication tables:
- 3, 6, 9, 12, 15, 18, 21, …
Pattern: “add 3 to the previous number to get the next number” - 0, 12, 24, 36, 48, 60, 72, …
Pattern: “add 12 to the previous number to get the next number”
We can also create sequences based on geometric objects:
Triangle Numbers
Pattern: “add increasing integers to get the next number”
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1
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3
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6
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10
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15
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Square Numbers
Pattern: “add increasing odd numbers to get the next number”
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1
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4
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9
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16
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25
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1, 4, 7, 10, 13, 16, 19, 22, 25, ...
This sequence has a difference of 3 between each number.
The pattern is continued by adding 3 to the last number each time, as shown above
3, 8. 13, 18, 23, 28, 33, 38, ...
This sequence has a difference of 5 between each number.
The pattern is continued by adding 5 to the last number each time, like this:
1. Find the common difference?
19, 27, 35, 43
2. Here is a number pattern. What is the missing number?
63, 55, 47, ? , 31, 23
11, 17, 23, ? , 35, 41
3. Here is a number pattern. What is the missing number?
63, 55, 47, ? , 31, 23
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