Lessons · Math
Math algorithms: older than computers
These two recipes are over 2,000 years old, and computers still run them every day. Primes keep your messages secret online; the GCD simplifies fractions and sets the teeth on gears.
Press play to start.
- Current prime
- Crossing out now
- Crossed out
- Prime
- Round 1
- Round 2
- Round 3
- Round 4
- Strip still to cut
Try it offline ·
- You need
- Time
Think about it
Work it out here
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