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Mathematics in the military
Han Xin is one of the founding heroes of the Western Han Dynasty, one of the four sages of the military, and one of the three outstanding heroes of early han dynasty. The representative figure of China Thought was called the soldier god by later generations. Han Xin's military is first-class. As can be seen from the appellation of Han Xin's relieving power in later generations, Han Xin's military capability is not boasted. But Han Xin is not only talented in the military, but also has a top sense of existence in mathematics. He left two famous math problems, which only a few people can solve so far.

The first is that before the war, Han Xin issued three military orders: the first, let three soldiers do two more people in a row; In the second way, five soldiers and four soldiers stand in a row; Third, let seven soldiers have six more people in a row; How many people are in Han Xin's army now? This is a modern mathematical problem that can be solved with unknowns, but ordinary people's mathematical thinking could not be done at that time, so this problem is also called the first problem in Han Xin.

The second topic is the very famous story of Han Xin's oil distribution. One day, Han Xin went out shopping and found two old people bickering, so he went to watch the fun. The reason for the quarrel between the two old people is simple. Both old people have a 10 kg basket with a 7 kg jar and a 3 kg gourd in it. The next question is, how do the elderly share 10 Jin of oil equally? This is also a mathematical problem solved by modern unknowns. This kind of question also shows Han Xin's superb talent and skills in mathematics, and his thinking is ahead of many people.

These two questions are enough to illustrate Han Xin's mathematical talent. Now his thinking ability must be a doctor-level figure, and his military ability is strong, but he can't play politics.