Mathematical handwritten newspaper information 1. Interesting math problem: which hotel do three people stay in for one yuan? The price per person per day is 10 yuan, and everyone pays 10 yuan, giving the boss 30 yuan in total. Later, the boss gave them a discount of five yuan and asked the waiter to return it to them. As a result, the waiter embezzled two yuan, and the remaining three yuan was refunded one yuan each, that is to say, each person spent 9 yuan money. Three people spent a total of * * * 27 yuan, plus 2 yuan, a corrupt waiter, spent a total of * * * 29 yuan. Where did the dollar go? Second, mathematics common sense People call 12345679 "missing 8 digits". This "missing eight numbers" has many surprising features. For example, if you multiply it by a multiple of 9, the product will consist of the same number. People call this "uniform". For example:12345679 * 9 =1111/kloc-0. 27 = 333333333 ... 1 2345679 * 81= 999999 These are all 9 times of1multiplied by 9. And 99, 108, 1 17 to 17 1. The final answer is:12345679 * 99 =1222212345679 *108 =13333333212345679. 444443 ...12345679 *171= 21165438. The performer is a 37-year-old woman from India. Her name is Shagongtana. On that day, she will compete with an advanced electronic computer with amazing mental arithmetic ability. The staff wrote a long list of 20/kloc-0 bits, asking to find the 23rd root of this number. As a result, it took Shagongtana only 50 seconds to report the correct answer to the audience. In order to get the same answer, the computer must input 20,000 instructions, and then calculate, which takes much more time than Shagongtana. This anecdote caused a sensation in the world, and Shagongtana was called a "mathematical magician".