Classical interesting math problems in senior one.
1. Xiaohua's father can cut off five of his own nails in 1 minute. How many nails can he cut in five minutes?
Xiaohua took 50 yuan's money to the store and bought a car worth 38 yuan, but the salesman only gave him 2 yuan money. Why?
3. Xiaojun said:? I went fishing yesterday and caught a tailless fish, two headless fish and three half-baked fish. Guess how many fish I caught. Guess how many fish Xiaojun caught?
4.6 horses and a cart ran six miles. How many miles did each horse run? How many miles did six horses run at a time?
5. A puppy tied to a tree trunk greedily eats a bone on the ground, but the rope is not long enough, which is 5 cm shorter. How do you teach dogs to scratch bones?
6. Wang walks from place A to place B. 1 minute later, Li walks from place B to place A. When Wang and Li meet on the road, who is farther from A?
7. The clock just struck 13. What should you do now?
8. On the vast grassland, there is a cow eating grass. This Niu Yi only ate half of the grass on the grassland in 2008. Q: How many years does it take to eat all the grass on the lawn?
9. Mom has seven pieces of candy. She wants to give them to the three children equally, but she doesn't want to cut the remaining candy. What should mom do? 10. There is a row of trees along the road in the park, and the distance between each tree is 3 meters. What is the distance between the first tree and the sixth tree?
1 1. Divide 8 in half, as shown below. How much is each half? The average score of arithmetic method is _ _ _ _ points, from which the horizontal score is _ _ _ _ points, and from which the vertical score is _ _ _ _ _ points.
12. A house has four corners, one corner has a cat, and there are three cats in front of each cat. How many cats are there in the room? 13. The house has four corners. There is a cat in a corner. There are four cats in front of each cat. How many cats are there in the room? 14. Xiaojun, Xiaohong and Xiaoping play chess. They always play three sets. Ask them how many games they played. (Every chess game is played by two people)
15. Xiaoming and Xiaohua each have a bag of sweets, but I don't know how many pieces there are in each bag. I only know that after Xiaoming gave Xiaohua 8 yuan, Xiaohua gave Xiaoming 14 yuan. At this time, the amount of sugar in their bags is exactly the same. Students, who do you think has more sugar? How much more?
Answers to Classical Interesting Questions of Mathematics in Senior One (1)
1.20, including fingernails and toenails.
2. Because he paid the salesman 40 yuan, he only gave him 2 yuan;
3.0, because the fish he caught does not exist;
4.6 Li, 36 Li;
Just teach the puppy to turn around and grab the bone with its hind feet.
6. They were in the same place when they met, so they were as far away from A;
7. This clock should be repaired;
8. It will never eat all the grass, because the grass will always grow;
9. Mom eats one piece first, and then gives two pieces to each child;
10. 15m；
1 1.4,0,3.
12.4;
13.5;
14.2 disk;
15. It turns out that there are many florets; 14-8=6 pieces, because the number of candy pieces of two people is exactly the same, so the result is that there are more small flowers than Xiaoming 12 pieces.
Classic interesting math problems in senior high school.
Cops and thieves.
A thief was found by the police, and the police chased the thief. The thief ran and ran, and a river appeared before him. This river is 12 meters wide. There is a tree next to the thief and the policeman. The height of the tree is 12 meters, and all the leaves on the tree are gone. The thief was wearing a 6-meter-long collar.
Ask the thief how to cross the river.
2. Divide the peaches.
The kindergarten teacher gave peaches to three groups of children. If only the first group of children are given peaches, each child will get seven peaches. If you only give it to the second group, each child can get 8; If you only give it to the third group, each child will get 9.
3. How many marbles are there?
Play marbles with Tian Tian on the grass every day and say, "Give me two marbles, so my marbles will be three times as big as yours." Tian Tian said to Tian Tian, "Give me two of your marbles, so that we can have as many marbles." Let's analyze, how many marbles are there with candy every day?
4. Transport rice.
There is 100 stone rice, which needs to be transported to Mihang by ox cart. Mihang happened to find 100 ox carts of different sizes. The big ox cart can transport three stones at a time, the middle ox cart can transport two, and the small ox cart needs two to transport one. Excuse me, if you want to transport all the rice and 100 cars, how to distribute the ox carts?
The frog jumped into the well.
There is a well with a depth of 4 meters and a smooth wall. There is a frog at the bottom of the well that always jumps out of the well, but this frog can jump up to 3 meters at a time. Do you think this frog can jump out of the well several times? Why?
Answers to Classical Interesting Questions of Mathematics in Senior One (2)
1. Answer: Tie the collar to the top of the tree, and the thief will swing with the collar. When the collar and the trunk form a 45-degree angle, the thief was thrown across the river as soon as he let go.
2.a: Now the teacher will divide these apples into three groups of children on average. Can you tell her how many apples to give to each child?
There are n peaches, one group of X seeds, two groups of Y seeds and three groups of Z seeds, so there are N/X=7, N/Y=8 and N/Z=9. As can be seen from the above formula, the number of peaches is the common multiple of 7, 8 and 9; Then the least common multiple 504 is calculated and divided by 7, 8 and 9 respectively, and the group number ratio is 72: 63: 56; Finally, divide 504 by the sum of 7, 8 and 9 to get 2 1 peach for each child.
3. A: Step 1: Suppose there are X marbles and Y marbles every day.
Step 2: We can get X+2 = 3y from everyday language;
Step 3: Sweet talk can get x2 = y；;
Step 4: Solve two formulas. x=4 and y=2 are the answers.
4. Answer: First of all, you can set X truck for Daniel, Y truck for Zhongniu and Z truck for Mavericks. According to the meaning of the question, X+Y+Z = 100, 3 * X+2 * Y+Z/2 = 100, and then discuss the situation to get the answer.
5. a: this question is easy to confuse people's thinking of doing the problem. Most people think that frogs can jump 3 meters at a time and 6 meters twice. If they exceed the depth of the well, they can jump out of the well twice. This is not right. Because the title says "the borehole wall is smooth", which means that when a frog jumps to a height of 3 meters, it will fall back to the bottom of the well because it hits the borehole wall, so no matter how many times the frog jumps, it can't jump out of the well unless it jumps above the depth of the well at once. Solve the problem.
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