Who has some math stories, riddles and jokes? Urgent.

imagine that you drink coke from a bottle. If you want to keep half the volume of the whole bottle of coke in the bottle, an easy way is to drink the liquid level in the tilted bottle to the intersection point between the bottom and the edge of the bottle.

here is a similar problem solved by different programs. A transparent glass bottle with irregular shape and strong acid. There are only two marks on the bottle, the high one is 1 liters and the low one is 5 liters.

someone used a small amount of acid, the amount of which was unknown, so that the acid in the bottle was slightly lower than that in 1 liters. You have to pour 5 liters of acid from the bottle for the experiment. This acid is dangerous and volatile, so it can't be poured into other containers. So what simple method can be used to pour out the exact amount?

the smart way is to put some small glass stones in the bottle until the acid level reaches the high mark, and then just pour out the acid until it reaches the low mark.

hippopotamus conundrum

a. Many years ago, the leader of a certain tribe revered the sacred hippopotamus.

B. Every year, on the leader's birthday, the leader and his tax collector will take the hippo to the tax collection station by royal barge.

C. There is a local custom to give the leader gold coins equivalent to the weight of the sacred hippo. The tax collection station also has a huge scale, which puts hippos on one side and gold coins on the other.

D. The leader fed the hippo so well that the hippo was so heavy that the weighing pole was broken. It will only take a few days to repair the scale.

e. The leader is very angry. He tells the tax collector.

Leader: I want to get my gold coins today, and it must be an accurate number. If you can't weigh out the gold coins before sunset, I'll behead you.

F. The poor tax collector was so scared that he could hardly think.

g. After several hours of thinking, he suddenly had a good idea. Can you guess what the idea is?

H. the idea is really very simple. The tax collector put the hippo on the boat and recorded the waterline of the boat.

i. Then he took the hippo away from the boat and put the gold coins on the boat. When the same waterline is reached, the weight of gold coins on board is equivalent to the weight of hippopotamus.