If it is a multiple of 3, the first block is replaced by A, the second block is replaced by B, and the third block is replaced by C. Put it in front of A and B for the first time (generally put 2 pieces in each pot). The second time, put the reverse of A, the reverse of C, the reverse of B, and the reverse of C. If it is six times, do it twice, and so on, which is three times. If it is an even number, the first time two blocks are positive, and the second time two blocks are negative.

Related introduction:

Mathematics (hanyu pinyin: shùXué；; ; Greek: μ α θ η μ α κ; English: Mathematics or Maths comes from the ancient Greek word μθξμα(máthēma), which means learning, learning and science.

Ancient Greek scholars regarded it as the starting point of philosophy and the "foundation of learning". In addition, there is a narrow and technical meaning-"mathematical research". Even in its etymology, its adjective meaning related to learning will be used to refer to mathematics.

Its plural form in English and as the plural form of mathématiques in French +es can be traced back to the Latin neutral plural (Mathematica), which is Cicero's plural from Greek τ α α θ ι α τ κ? (ta mathē matiká).

In ancient China, mathematics was called arithmetic, also called arithmetic, and finally changed to mathematics. Arithmetic in ancient China was one of the six arts (called "number" in the six arts).

Mathematics originated from early human production activities. The ancient Babylonians had accumulated some mathematical knowledge, which could be applied to practical problems. Judging from mathematics itself, their mathematical knowledge is only obtained through observation and experience, and there is no comprehensive conclusion and proof, but we should fully affirm their contribution to mathematics.