1, 1 Yuan for a bottle of soda, and after drinking two empty bottles for a bottle of soda, Q: How many bottles of soda can you drink at most if you have 20 yuan money? Answer: 20 bottles were fine at first, and then 5 bottles were fine at 10. Then divide the 5 bottles into 4 bottles and 1 bottle, and replace the first 4 empty bottles with 2 bottles. At this time, there are still two empty bottles at hand after drinking, so change these two bottles into 1 bottle to continue drinking, then change this 1 bottle to 1 bottle after drinking, and then return the bottles to others after drinking, so that the soda can be drunk at most 20+10+5+2+6544.

2. A manager has three daughters, and their ages add up to 13, which is equal to the manager's own age. A subordinate knows the manager's age, but still can't determine the age of the manager's three daughters. At this time, the manager said that only one daughter's hair was black, and then the subordinates knew the age of the manager's three daughters. What are the ages of the three daughters? Why? Answer: 229, because only 36 = 6*6* 1 36 = 9 * 2 * 2.

Two rings with radii of 1 and 2 respectively. The small circle goes around the big circle. How many times does the small circle turn by itself? If it is outside the big circle, how many times does the small circle turn by itself? Answer: You can think of a circle as a rope. The big rope is twice as long as the small rope, so it should be two laps. Hehe, just three questions. I hope to adopt it ~