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Why does mathematics originate from knot number and land survey?
The origin of mathematics can be traced back to the early days of human civilization, when people needed to solve some practical problems, such as counting, distribution and measurement. Node counting and land survey are one of the earliest mathematical practices, which laid the foundation for later mathematical development.

Knot number is an ancient counting method, which uses knots on a rope to represent numbers. This method first appeared in the Neolithic Age, when people used it to record the number of prey and the number of items traded. The appearance of knot counting enables people to make more complicated calculations, thus promoting the development of mathematics.

Land survey is also an important mathematical practice. In ancient times, land was one of the most important resources, so people needed to accurately measure the size and shape of land. In order to achieve this goal, people invented various measuring tools and methods, such as sundials, rulers, compasses and so on. The use of these tools and methods enables people to calculate the area and perimeter of land more accurately, thus promoting the development of geometry.

In a word, knot number and geodetic survey are one of the earliest mathematical practices, which laid the foundation for the later mathematical development. These practices not only help people solve practical problems, but also promote the development of mathematical theory.