1. The magician asked the audience to randomly select a two-digit number, and then added the ten digits of the two-digit number with the one digit to get a sum.
The magician asked the audience to tell themselves the sum they got, and then the magician silently calculated it in his mind, so that he could accurately tell the audience what the first two digits were.
The principle of this magic is to use the concept of "digital root" in mathematics. Each two-digit number has a corresponding number root, which is the sum of ten digits and four digits. For example, the number 23 is 5 because 2+3=5. By calculating the number roots of all two digits in advance and according to the sum told by the audience, the magician can quickly calculate the original number chosen by the audience.
Of course, besides this magic, there are many other interesting mathematical magic tricks, such as predicting the playing cards chosen by the audience through mathematical formulas, performing with Fibonacci numbers and so on. These magic tricks not only show the charm of mathematics, but also make the audience feel the fun of mathematics in entertainment.
The origin of magic
The origin of magic can be traced back to ancient times, and its history can be traced back to around 1000 BC. The earliest magicians were probably priests and clergy in ancient Egypt. They used various skills and techniques to show mysterious forces and supernatural phenomena. Magic is ubiquitous in ancient civilizations, such as ancient Greece, ancient Rome and ancient India.
In ancient times, the main purpose of magic show was to entertain and show mysterious power. Magicians can use various props and techniques, such as handkerchiefs, hats, mirrors, etc. To create all kinds of magical scenes. There are various forms of magic performances, including magic tricks, acrobatics, dancing and so on.
With the passage of time, magic show has gradually developed into an art form and formed various schools and styles. Modern magic performance has become an important branch in the field of artistic performance, which is widely used in entertainment, stage performance, TV programs and other fields.