31/08/2025
The world's oldest mathematical instrument was found here | Pre-colonial Africa The Ishango Bone works as humanity's earliest known mathematical calculator, discovered in what is now the Democratic Republic of Congo and dating back approximately 20,000-25,000 years. Here's how this prehistoric mathematical tool may have functioned: The bone contains three distinct columns of carved notches, each serving a different mathematical purpose. The first column demonstrates a base-10 decimal system, with groupings that show 20+1, 20-1, 10+1, and 10-1. The second column contains a remarkable sequence: the prime numbers 11, 13, 17, and 19. The third column illustrates multiplication by doubling, showing 3 notches that double to 6, then to 4 and 8, demonstrating early understanding of mathematical operations. Some also speculate a base-12 counting system. The bone has been called "the oldest mathematical tool of humankind" by researchers who note that the organized, systematic nature of the notches clearly indicates intentional mathematical thinking rather than random marking.
Fair Use Images from:
- https://afrolegends.com/2013/08/29/the-ishango-bone-craddle-of-mathematics/
- https://www.msingiafrikamagazine.com/2021/03/the-ishango-bone/
- https://www.linkedin.com/posts/simeon-booker-muhammad-40686b260_africa-on-instagram-the-earliest-known-activity-7343352594313953280-J08O
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