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One knot, one unit, in the tens and above.
Also known as: Simple knot, Overhand knot quipu
The Andean knot record's simple overhand knot, each one standing for a single unit in its decimal position.
Stands for one unit in the decimal position where it is tied, used for tens and higher.
Contexts: Mathematics, History
Position along the cord carries the power of ten, so a knot's meaning depends on its height as a digit's meaning depends on its column — the same principle as written place value, expressed in space rather than on a line.
Contexts: Mathematics, History
A plain overhand loop tied in a hanging line of cord, repeated up to nine times in a cluster at a fixed height along it.