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Did you solve it? The knotty problem of Paddington in Peru | Science

Earlier today I gave you a puzzle about quipu, the Inca method of recording numbers with knots on a thread, practiced in Paddington, Peru. Here's the answer again. The Incas used quipus to record dates, taxes, and measurements, among other things. Knowledge of how quipus represented numbers was lost after the Spanish conquest until 1912, […]