2. "Xiao Ming came back from fishing, and Xiaoling asked him how many fish he caught. Xiao Ming replied, "Six have no heads, nine have no tails, and eight have only half bodies." Do you know how many fish Xiao Ming caught? "
3. "There are five numbers A, B, C, D, E, ABCDE×A=EEEEEE. What are these numbers? " (according to the verification, it was found that the topic was missing an e, so it was corrected. Thanks for reminding me! )
4. A person bought a chicken for 8 yuan, sold it for 9 yuan, and then felt that it was not worthwhile. He bought it back at 10 yuan and sold it to another company at 1 1 yuan. How much did he earn?
A businessman in a city has a donkey and 3000 carrots. If you want to pull carrots to B city, which is 1000 kilometers away, you can only carry them on donkeys. As we all know, donkeys can carry 1000 carrots at a time, but they have to eat one carrot every kilometer. How many carrots can merchants sell? Does the donkey eat radish? I don't know, it's a Korean crossword puzzle)
6. There is a fork in the road, and there are two roads. One is a way out, and the other is a dead end. There are two people at the intersection, one is telling the truth and the other is telling a lie. You can ask each of them a question, but their answer can only be "yes" or "no", so you can judge for yourself which way is the way to live.
Four children saw a stone rolling down the hillside, so they started talking. "I think this stone weighs 17 kg," said the first child. "I said it weighs 26 kilograms," said the second child disapprovingly. "I think it has 2 1 kg," said the third child. "You are all wrong. I think its correct weight is 20 kilograms, "argued the fourth child. The four of them were red-faced, and neither of them would accept the other. Finally, they weighed the stone, but no one guessed correctly. One of them guessed that the weight was 2 kilograms different from the correct weight of the stone, and the other two guessed that the weight was the same as the correct weight of the stone. Of course, the difference referred to here is absolute and has nothing to do with symbols. How much does this stone weigh?
8、 1,3, 12,40,(? ) Guess what the fifth number is?
9. There are 30 students in a class, 22 of them are excellent in math test, 25 in Chinese and 20 in English. How many of them are excellent in at least three subjects?
10. There are now 12 bags of coins (the number of coins in each bag is 100), but it is known that one bag is counterfeit. How many times does it take to find this bag of counterfeit money? (Known genuine coins: 10g/ piece; Counterfeit currency 9g/ sheet)
1 1, 1 Yuan for a bottle of soda. After drinking two empty bottles, change one bottle of soda. Q: You have 20 yuan money. How many bottles of soda can you drink at most?
12, there are one hundred eggs and nine bowls. Only an odd number of eggs can be put in each bowl. Ask how to divide it?
13, Party A and Party B live in the sixth floor office, and Party B lives in the third floor office. Their daily itinerary is exactly the same. How many stairs does Party B climb every day?
14. How many pieces can a watermelon be cut with four knives?
15. How many blocks can you divide it into by drawing 10 lines on a plane?
16. A bacterium divides into two in one minute and four in two minutes. Put one of these bacteria into the bottle, and the bottle will be full in an hour. Now put two such bacteria in the bottle. How long will it take to fill the bottle?
1 On the map with the scale of 1: 400000, the distance between the two ports in AB is 9CMA. A cargo ship sailed from Port A to Port B at a speed of 24 kilometers per hour at 6: 00 in the morning and arrived at Port B at ().
Due to the serious environmental pollution in a certain area, some frogs have mutated. Some frogs have three legs and some frogs have five legs. At present, 98 frogs with 386 legs have been captured from this area, including 2 frogs with five legs and 4 frogs ().
1:1/3,1/2, 5/9, 7/12, 3/5,118 ... Eleventh.
2 has a fraction, the numerator plus 1 can be converted into 1/4, and the denominator minus one can be converted into 1/5, and this fraction is ().
3 Define a new operation: a triangle b=ab/a+b, then two triangles 10 triangles 10 triangles =( ).4 It takes 5 seconds for a train to pass a road sign, 20 seconds for a 300-meter-long bridge and () seconds for a 800-meter-long cave.
5 If a/b*b=2/45, the minimum values of A and B are A = () and b= () respectively.