World History163 views·Updated Aug 3, 2026Mathematics and the Incan Quipu
Students will practice interpreting the base-ten positional system and mathematical operations represented through specific Quipu knot placements.
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World History163 views·Updated Aug 3, 2026Mathematics and the Incan Quipu
Students will practice interpreting the base-ten positional system and mathematical operations represented through specific Quipu knot placements.
A historian is examining a Quipu from the 15th century. She notices a cord with three distinct clusters of knots: the top cluster has 4 knots, the middle cluster has 2 knots, and the bottom cluster has 6 knots. Based on the Incan base-ten positional system where the highest position represents the largest power of ten, what total value does this cord represent?
- A historian is examining a Quipu from the 15th century. She notices a cord with three distinct clusters of knots: the top cluster has 4 knots, the middle cluster has 2 knots, and the bottom cluster has 6 knots. Based on the Incan base-ten positional system where the highest position represents the largest power of ten, what total value does this cord represent? — 426
- An Incan official, or Quipucamayoc, needs to record a harvest of 508 bushels of maize. Using the standard base-ten knot system, how would this value be represented on a single cord? — 5 knots at the top, a 0-knot gap, and 8 knots at the bottom
- A secondary source describes how the Inca used 'sumiary cords' to aggregate data from several smaller cords. If four cords show values of 10, 25, 5, and 20 respectively, how would the sumiary cord most likely represent the total sum? — A cluster of 6 knots in the tens place and a gap in the ones place
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