Digit Cards

A simple guide to the ten digits—the foundation of arithmetic.

Explore the 'Famous Ten'

The links below will provide more information ~

Why publish digits.cards?

• About this site
• Why digits? Why cards?

Learn more

• History
• General principles
• Digits and numbers

The Digits

• 0 zero, nought, nothing—does it exist?
• 1 universal abstraction for some "thing"—but what?
• 2 another "thing"—the same?—or different?
• 3 for some people "three" does not exist—ouch?
• 4 it gets easy—the pattern for making "3" repeats
• 5 same method for getting here—different shape
• 6 same method for getting here—different word
• 7 same method for getting here—different code
• 8 same method for getting here—different symbol
• 9 long ago it was decided "that's enough digits"