Analysis of the Battle Rules of Super Brain Seven-Order Rubik's Cube?

In the battle of the Seven-step Rubik's Cube, the program group will give a seven-step Rubik's Cube consisting of 343 Rubiks' Cube, with 2 18 Rubiks' Cube on the surface and 125 Rubiks' Cube inside. The guest will choose one cube on each of the two faces as the hidden point of the prime number, and the system will randomly select five cubes as the hidden point of the prime number. These seven hidden points of prime numbers are connected in pairs, and only two straight lines intersect vertically. The treasure is hidden at that intersection. Two contestants need to accurately decipher the prime code.

Do you think this is the end? Not exactly. The anomaly of this problem is that, first of all, players need to eliminate all non-prime numbers through mental arithmetic and confirm 7 prime numbers. Finally, the faces of the cube will be displayed in parallel, that is, the player will not see a three-dimensional figure, but six square planes.

Players need to build a cube in their mind, then connect seven prime numbers in pairs according to their imagination, and finally eliminate interference items and find the vertical intersection line. Therefore, this is an abnormal problem that tests the mental arithmetic ability and spatial ability of the players.

Do you think this problem is a bit brain-burning? But this can only be a small challenge for our Super Brain players, and the two people who challenge this project in the program are Yang Yi and Liu Yu of Peking University, which have attracted much attention.

Yang Yi, a contestant, won the top prize in science in Tongzhou District of Beijing in one fell swoop in the college entrance examination, and was admitted to the School of Life Sciences of Tsinghua University to study undergraduate and master's degrees in Tsinghua University. Although he has been admitted to the highest institution of learning that many people dream of with the title of top scholar in the district, Yang Yi is still a little sorry about the college entrance examination. He thinks that his college entrance examination English composition is off topic and he missed his favorite major. Sure enough, the psychology of learning hegemony is beyond our understanding.

Yang Yi has excellent imagination and creativity, and has a strong thirst for knowledge about things he is interested in. He is serious and likes accurate results, but he doesn't like to make up for vague results. At the beginning of the brain test, Yang Yi was comfortable with what he was good at. For the spinning Sudoku project that he had never touched before, he also successfully completed it with a little attempt, showing amazing brain power.

Liu Yu is studying in the Chemistry Department of Peking University. He had a hunch that he could go to Peking University after the college entrance examination. When the admission notice was sent down, sure enough, the admission notice came from Peking University. Brother Qiang envies this talented person who is not blind and confident.

Although she was successfully admitted to Peking University, Liu Yu didn't seem to like chemistry very much, because she felt that she was not very good at chemistry, especially she didn't like doing experiments, especially in Peking University, where there were too many strong people, and there would be great frustration. He is more interested in computer programming. For this hobby, he has bought a computer online course for self-study to make up for his regret.