Brain teaser

Smart break, open brainstorming, online quiz brain teaser.

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A 2-meter-long rope tied a puppy to a tree trunk. Although the puppy greedily looked at the L bones 2.1 meters away from it on the ground, it could not reach it. May I ask, what method should the puppy use to grasp the bones?
Smoker A smokes 50 cigarettes a day, smoker B smokes 10 cigarettes a day. Five years later, smoker B smokes more than smoker a. why?
If the first number in front of a number is 11 and the last number is 50, what is the original number?
There is a kind of bacteria, after 1 minute, split into 2, another 1 minute, split into 4. In this way, it took 1 hour to put a bacterium in the bottle until it was full. If two of these bacteria are put into the bottle at the beginning, how long will it take to fill the bottle?
Put eggs in a basket, assuming that the number of eggs in the basket doubles every minute, so that after 12 minutes, the basket is full. So, when is the half basket of eggs?
There are 100 teams to win the championship, at least how many games?
Use three 3 s to form a maximum number?
Xiao Ming took 100 yuan to buy a shirt from 75 yuan, but the boss only gave him 5 yuan. Why?
Rose, who was just on her first day of kindergarten, had never studied mathematics, but the teacher praised her as one of the best in mathematics. Why?
How many cubic meters of mud are there in a pond 4 meters long, 3 meters wide and 2 meters deep?
Xiao Ming took 100 yuan to buy a 75 yuan item, but the boss only found 5 yuan for him. Why?
Can you use 3 chopsticks to set up a number larger than 3 and smaller than 4?

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