The difference between each number in an arithmetic sequence.

Example: the sequence {3, 5, 7, 9, 11 ...} is made by adding 2 each time, and so has a "common difference" of 2 (there is a difference of 2 between each number)

Example: the sequence {3, 5, 7, 9, 11 ...} is made by adding 2 each time, and so has a "common difference" of 2 (there is a difference of 2 between each number)

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