The most interesting math problem
No.65438 +0 soda problem difficulty index: ★★★★
The price of each bottle of soda is 1 yuan, and every two empty bottles can be directly exchanged for 1 bottle of soda. How many bottles of soda can I drink for 20 yuan?
NO.2 difficulty index of matching placement problem: ★★★★
1-70 1=2 spelled with matchsticks. Move a matchstick to make the equation hold.
The problem of buying books on the 3 rd
Difficulty index: ★★
A group of pupils went to the bookstore to buy books. They only bought Chinese, math and English books. Everyone buys books, but the quantity is different. Some pupils bought only one book, some bought two books and some bought three. It is known that only one book can be bought for each kind, and all primary school students have bought books. So how many primary school students need to buy books before two people can buy the same book?
No.65438 +0 soda problem
Answer: 1, buy 20 bottles, drink 20 bottles, empty 10 bottles (20)2, 20 empty bottles for 10 bottles, drink 10 bottles, empty 10 bottles (/kloc-0 Empty 3 bottles (2)5, 3 empty bottles 1 bottle, drink 1 bottle, empty 2 bottles (1)6, empty 2 empty bottles 1 bottle, empty 1 bottle (1
The second matching position problem
Answer: 1 plus the minus sign on 1 = 2...7.
The problem of buying books on the 3 rd
Answer: List all situations Suppose the first child bought a Chinese book, the second child bought a math book, the third child bought an English book, the fourth child bought a Chinese book and a math book, the fifth child bought a Chinese book and an English book, the sixth child bought a math book and an English book, and the seventh child bought a Chinese book, a math book and an English book, so there are seven kinds of books to buy.
Ten interesting primary school math problems
1. 1. There were 10 fish in the fish tank, and two fish died. How many fish are there in the fish tank? 2. 1 Children eat a hamburger every 6 minutes. How many minutes does it take for three children to eat 1 hamburger at the same time?
Answer:
1. There are 10 fish in a fish tank. (explanation: a dead fish is also a fish. Without emphasizing the removal of dead fish, it is still necessary to count the number of dead fish. )
2. It takes 6 minutes. (explanation: in the case that a child eats a hamburger in six minutes, it takes six minutes no matter how many children eat it at the same time. )
Second, a group of children play with eagles to catch chickens. One plays the eagle, one plays the hen and eight plays the chicken. Please come to three more groups. How many children are there in a group?
Answer: A * * * has 30 children. (explanation: a * * has four groups, one is eagle 1+hen 1 +8 chicks, which is equal to 10 children, and a * * has 40 children. )
Third, the children line up, the little red row is seventh from left to right, and the little red row is eighth from right to left. How many people are there in this row?
Answer: There are 14 children in this line.
Fourth, tell the truth: eight children played hide-and-seek and four were caught. How much is left?
Answer: There are three left. (Explanation: Eight children play hide-and-seek, one is an eagle and only seven are chickens. After four children were arrested, there were three left. )
Five, there are two cups of juice, the baby drank half a cup first, and the mother filled it again; The baby drank another half cup, and the mother filled it again. Finally, the baby drank it all. How many cups did the baby drink?
Answer: One * * * drank three cups. (Explanation: 2+0.5+0.5=3 cups)
6. Strawberries and peaches each represent a number. Strawberries and peaches are equal to 7, strawberries and peaches are equal to 8, how much are strawberries and peaches?
Answer: There are four strawberries and three peaches. (explanation: strawberries represent a number. If the sum of two identical numbers is 8, we can know that strawberry represents the number 4, so 4+3=7, so there are three peaches. )
Seven, Xiao Fang spent 60 cents on a Pinyin book, with 40 cents left. How much money does Xiao Fang have? how much is it?
Answer: The small square used to have an angle of 10, which is 1 yuan. (explanation: 1 element has 10 angles. )
Eight, a pile of palm-sized hard cards represent numbers, circular cards represent 1, rectangles represent 2, triangles represent 3, squares represent 4, and pentagrams represent 5. Say a number and hold up the cards that make up the number. A, spell 6 B, spell 10 C, spell 13
Answer:
Explanation: it is to spell numbers with numbers, and each number represents a number. In the case of preset cards of various shapes: spell 6: it is a circle+a five-pointed star, or a rectangle+a square. Spelling 10: it means rectangle+triangle+pentagram, or circle+square+pentagram, or circle+rectangle+triangle+square. Spell 13: circle+square+pentagram+triangle.
9. On the bus, five people got on at the first stop, two people got off at the second stop and three people got on at the third stop. Q: How many people are left in the car? How many tickets did that aunt sell?
Answer: It can be 8 or 6. (explanation: there are two situations. Including the flight attendants, that is, the driver and the aunt who sells tickets, there are only eight passengers on the bus. )
Ten, the number greater than 67 says three, and the number less than 67 says three.