We count in tens because we have ten fingers! When you were little, you probably used your hands to count, one finger for each number. So it makes sense that we use a system with ten numbers: 0 through 9. If humans had eight fingers or twelve fingers, we might count using eights or twelves instead!
Examples
- If you have ten fingers, it's easy to count up to ten.
- Kids use their hands to count when they start learning numbers.
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See also
- Why Our Counting System is Biased?
- How Does Ten Fingers Work?
- Why Do We Count on Our Fingers?
- Why Do Numbers Have Special Names?
- Why Do We Use ‘Fingers’ for Counting and What Are the Alternatives?