The common difference is the difference between each consecutive number in an arithmetic sequence.
How to find the common difference
![Common difference in the arithmetic sequence - how to calculate it and an example.](https://www.inertialearning.com/wp-content/uploads/2020/12/Common-Difference-1.png)
Derivation
The common difference is the difference between two consecutive terms in an arithmetic sequence (by definition). Thus we find the common difference by finding the difference between two consecutive terms.
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