Han Xin was the main hero of Liu Bangli Han, but he was finally suspected and killed by Lv Hou and Xiao He. Han Xin's life was brilliant and tragic. He was originally under Xiang Yu, but he took refuge in Liu Bang because he could not be reused. As a result, life is the last one. Later generations also spoke highly of Han Xin, and various legends related to him were circulated among the people. One of the stories is that Han Xin left two math problems that many people couldn't solve. Now, I wonder if you can solve these two problems?

Han Xin is not only strong in military, but also gifted in mathematics. He left two questions in his life, and many people can't count them!

When it comes to Han Xin, you shouldn't feel strange. Han Xin can be regarded as one of the most famous generals in the history of China. He lived in the Han Dynasty and helped Liu Bang conquer the world. Without Han Xin, Liu Bang's world could not have won so smoothly. However, Han Xin's final fate was tragic. When future generations mention Han Xin, the first thing that comes to mind is that he is an outstanding strategist, but few people know that Han Xin is not only a military wizard, but also very talented in mathematics.

Ancient mathematics, the most commonly used machines are ancient abacus and abacus calculation methods, which have been listed in the world material and cultural heritage in recent years, showing the achievements of ancient life. In ancient mathematics, some of the most prominent and common topics have also been handed down and are faintly visible in today's primary school textbooks.

On a trip to Han Xin, I happened to meet two old men who were at loggerheads. Han Xin unknown so, stop the horse and ask why. It turned out that two old people came out to buy oil together. An old man was carrying a 10 kg basket, and another old man was carrying a 7 kg bucket and a 3 kg oil gourd. Both of them want to buy 5 Jin of oil and go home together. In order to save trouble, the oil seller directly injected 10 kg of oil into Jia Laohan's 10 kg oil basket. However, when the two old people came home, they were worried about the distribution of oil. Old man Jia has 10 Jin of oil in his oil basket. How can I share 10 Jin of oil smoothly?

Another war is about to start. If the soldiers count by themselves, it will not only delay time but also be very troublesome. At this time, Han Xin's talent in mathematics was revealed. He immediately ordered three soldiers to have two more rows, five soldiers to have four more rows, and seven soldiers to have six more rows. It is estimated that many readers may not understand what this order means when they see it. If they do, how many soldiers are left in Han Xin's army?