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The question of water volume. Imagine you drinking Coke from a bottle. If you want to keep half the volume of Coke in the bottle, an easy way to do this is to drink until the level of the liquid in the sloping bottle reaches the point where the bottom and the edge of the bottle meet.
Here's a similar problem that is solved with different programs. A transparent glass bottle, irregularly shaped and filled with strong acid. There are only two markings on the bottle, the high one is 10 liters and the low one is 5 liters.
Someone used a small amount of acid, the amount of which is unknown, so that the acid in the bottle was slightly lower than at 10 liters. You're going to pour 5 liters of acid out of the bottle for experiments. This acid is dangerous, highly volatile, and cannot be poured into other containers, so what is the simple way to pour out the exact amount?
The smart way to do this 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 puzzles. a Many years ago, the leader of a tribe revered the sacred hippopotamus.
b Every year on the chief's birthday, the chief and his tax collector carry hippos in royal barges to the tax collection station.
c There is a local custom that the chief is given a gold coin equal to the weight of the sacred hippopotamus. 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 hippopotamus so well that the hippopotamus was so heavy that the weighing rod broke. It can only be delayed for a few days to repair the weighing rod.
e The chief was very angry and told the tax collector.
Boss: I'm going to get my gold today, and it must be in the exact amount. If you can't weigh the gold coins before sunset, I'll behead you.
f The poor tax collector was so frightened that he could barely think about it.
After a few hours of thinking, he suddenly had a great idea. Can you guess what the idea is?
The idea is really simple. The tax collector puts the hippopotamus on the boat and writes down the waterline of the boat.
He then took the hippopotamus away from the boat and put the gold coins on the boat. When the same waterline is reached, the weight of the gold coins on the boat is equal to the weight of the hippopotamus.
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Under what circumstances does one plus one equal to three?
Hehe. Classic.
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Wearing a pointed iron hat and an octagonal dragon robe, it was helpless on all sides, and it did not fall down in the strong wind. (Traffic Building).
The answer is towers.
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Eighty-nine upside down, ninety-eight.
A: Miscellaneous.
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Fox buys onions with math.
The fox limped along, wondering how to make a fortune.
The lame fox saw the old goat selling green onions, walked over and asked, "Old goat, how do you sell these green onions?" How many green onions are there? ”
The old goat said: "1 kilogram of green onions sells for 1 yuan, a total of 100 kilograms." ”
The lame fox rolled his eyes and asked, "How much is your green onion, how white is the green onion, and how many green onion leaves?" ”
The old goat said impatiently: "A green onion, the white onion accounts for 20, and the remaining 80 are green onion leaves." ”
The lame fox counted with his fingers, and said, "The green onion is white, and I will give you 7 dimes for 1 kilogram." Green onion leaves, 1 kilogram gives you 3 corners. 7 jiao plus 3 jiao is exactly equal to 1 yuan, okay? ”
The old goat thought about it, and felt that the fox had a point, so he agreed to sell it to him. The fox smiled and began to count the money.
The fox made a list of equations:
Yuan), and then said: "100 kilograms of green onions, green onions account for 20, that is, 20 kilograms." 1 kilogram of green onion white 7 dimes, a total of 14 yuan; Green onion leaves account for 80, that is, 80 kilograms, 1 kilogram 3 dimes, a total of 24 yuan.
Together, it's $38. Right? ”
The old goat counted for a long time, but he couldn't figure it out, so he had to say, "You just have to calculate it correctly." ”
I'm a fox who never gets a fool! Give you 38 yuan, count it! The fox handed the money to the old goat.
The old goat went home after selling the green onions, and always felt that the money seemed to be a little less, but where was the less? Can't think of it. He looked down and saw the little mole coming out of the ground.
He asked the little mole to help him settle the score.
The little mole said, "You used to sell 1 kilogram of green onions for 1 yuan." You have 100 kilograms, you should sell it for 100 yuan, why does the lame fox only give you 38 yuan? ”
The old goat nodded, knowing that he had suffered a loss. But he didn't understand, how did he suffer?
The mole said: "The fox gives you 1 kilogram of green onions and 7 jiao, 1 kilogram of green onion leaves and 3 jiao, which adds up to 2 kilograms for only 1 yuan, and you have already suffered half of the loss." ”
The old goat asked: "I should have 50 yuan for half of the loss, why only 38 yuan?" ”
The mole wrote an equation:
$1). "You suffer a loss of 1 kilogram of green onions, and 20 kilograms of 6 yuan; 1 kilogram of green onion leaves suffered a loss, and 80 kilograms suffered a loss of 56 yuan, which was sold for 62 yuan less. ”
The old goat turned around and ran back, and saw the fox selling onions for 2 yuan per kilogram. The old goat didn't say a word, but lowered his head, put his horns against the lame fox's waist, and pushed him into the pool.
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Little Bear's mother was sick, and in order to earn money to treat her mother's illness, Little Bear got up before dawn every day to go down to the river to fish, and rushed to the morning market to sell fish in the vegetable market.
One day, as soon as the bear had set up the fish stall, the fox, the black dog, and the old wolf came. Seeing that a customer was coming, Xiao Xiong hurriedly greeted: "Buy fish, my fish has just been caught, and it is fresh!"
The fox rummaged around the fish and asked, "How much is such a fresh fish per kilogram?" The bear smiled all over his face
It's cheaper, four dollars a kilogram. The old wolf shook his head: "I'm old, my teeth are not good, I just want to buy some fish body."
Xiao Xiong's face was embarrassed: "I sold the body of the fish to you, who will sell the head and tail of the fish to?" The fox flicked his tail and said
Yes, no one wants to buy the rest, but Uncle Wolf has bad teeth and can only eat some fish. That's it, I'm good with Black Dogtooth, let's buy a fish head and a fish tail, won't we help Uncle Wolf and your brother Xiong? Little Bear clapped his hands when he heard this, but still hesitated a little:
It's good, but how to set the price? The fox rolled his eyes and replied, "The body of the fish is 2 yuan and 1 kilogram, and the head and tail of the fish are 1 yuan and 1 kilogram each, isn't it exactly 4 yuan and 1 kilogram?"
The bear drew on the ground with a stick, and then slapped his thigh: "Okay, that's it!" "The four of them worked together, and after a while, the fish head, fish tail, and fish identity were good, and the bear passed the scale, and the fish body was 35 kilograms and 70 yuan; 15 kg of fish head 15 yuan, 10 kg of fish tail 10 yuan.
The old wolf, the fox, and the black dog carried the fish, and ran quickly into the woods, matched the head and body of the fish, and redivided the ,......
On the way home, Xiao Xiong thought as he walked: I should sell 60 kilograms of fish for 240 yuan at 4 yuan per kilogram, but why is it only sold for 95 yuan ...... nowLittle Bear couldn't figure it out.
Do you know what's going on?
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Once Tang Seng asked Sun Wukong, Zhu Bajie, and Sha Monk to pick peaches, Sun Wukong, Zhu Bajie and Sha Monk came back from picking peaches, and the master asked them how many peaches they picked. Sun Wukong smiled and said: "Hehe, master, I'll test you, the number of peaches picked by me and Zhu Bajie, or Monk Sha is the same, the number I picked is three, three, three three, and there is one left."
Zhu Bajie smiled maliciously and said, "Master, master, I count four by four, and there is one left." Monk Sha also said, "I count five or five, and there is one left."
Sun Wukong Zhu Bajie and Monk Sha said together: "The total number of peaches we pick does not exceed 100!" At that time, Tang Seng immediately said the number they picked, do you know how many peaches they had?
The answer is: 61 peaches.
The reasons are: 3 4 5 1 61
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Question 1: Just measure the shadow of the flagpole.
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There were three statisticians who went hunting, and they saw a deer, and the first statistician's bullet was one meter to the left, the second statistician's bullet was one meter to the right, and the third statistician was excited and said, "Hey, on average, we hit that deer." ”
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Xiao Ming took the math test in elementary school, and when he came back, his mother asked him how he did on the test. Xiao Ming said:"I can basically do it, but there is a 3 by 7 problem that I can't figure out. Finally the bell rang, and I wrote an 18 regardless of thirty-seven twenty-one"
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100 points After the final exam, Xiao Liang went home and said, "This time I scored 100 points in the two exams. Mom and Dad were very happy to hear this.
Xiao Liang continued: "It's two doors that add up to 100 points. When Dad heard this, he raised his hand and was about to beat, but Mom persuaded him and said:
Even if you score 40 points in Chinese, you should always score 60 points in arithmetic, and there is always a passing grade! Xiao Liang said aggrievedly: "Mom, it's not that algorithmic!"
Isn't it 10 points for Chinese and 0 points for arithmetic? ”
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My people have a person when I am.
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The last one is not about mathematics.
The wren who doesn't speak.
Zhang Zhang is a lonely old man, and the only one is the wren brother raised by the family. >>>More
1. The short story of Chen Jingrun in mathematics.
Mathematician Chen Jingrun, while thinking about a problem, walked and hit the trunk of a tree without raising his head and said, "I'm sorry, I'm sorry." "Keep thinking. >>>More
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1. The evidence for the origin of the universe is ( ).
a Hubble's Law. >>>More
Nonsensical funny words 1The big dog holding my sister in front of you let Jean block the view 2Regardless of the white cat, the black cat is a good mouse as long as it can catch the cat 3In the past, it was popular to wear black red shoes in our school 4A driver who doesn't want to be a chef is not a good doctor.