Yupana (Quechua for "counting tool") is a calculator which was used by the Incas. Researchers believe that calculations were based on Fibonacci numbers to minimize the number of necessary grains per field.

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  • Yupana (Quechua for "counting tool") is a calculator which was used by the Incas. Researchers believe that calculations were based on Fibonacci numbers to minimize the number of necessary grains per field.
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  • Yupana (Quechua for "counting tool") is a calculator which was used by the Incas. Researchers believe that calculations were based on Fibonacci numbers to minimize the number of necessary grains per field.
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  • Yupana
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