Inca used Quipu knots for calculations without writing

Inca used Quipu knots for calculations without writing. Inca spread unrepeatable stoneworking knowledge far and wide without any form of writing They relied only on Quipu, a tapestry abacus system of knots in threads The Inca and their descendants used Quipu for calculations despite having no numbers

The Inca transmitted complex knowledge across their empire using Quipu — a system of knotted cords that encoded data through color, knot types, and string arrangement. They recorded calculations and information without any formal written language. The Inca had a decimal numerical system, and Quipu served as their recording and calculation device — effectively functioning as a portable, knot-based database for administrative and census data across the empire.

Key Facts

• Inca spread unrepeatable stoneworking knowledge far and wide without any form of writing
• They relied only on Quipu, a tapestry abacus system of knots in threads
• The Inca and their descendants used Quipu for calculations despite having no numbers
• Pythagoras theorized the Pythagorean theorem without numbers, which did not appear in Europe for another 1000 years

Related site: Ingapirca Archaeological Complex — view location, images, and history on the Ancient Nerds map.

Source: The builders had a secret - No one ever wrote about building cyclopean walls. by One-eyed giant building walls