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Xiaoli mathematics
Mathematical olympiad in the third grade of primary school

1, Xiaoli got 97, 98 and 96 in math, Chinese and English respectively, and his average score was ().

2. Multiply a number by 6, add 6, subtract 6 and divide it by 6, and the result is still 6. This number is ().

There are six basketballs and six red balls mixed in the bag. Ask at least () balls at a time to ensure a red ball.

4. Wang Ming scored an average of 95 points in mathematics and Chinese, 96 points in the last three subjects in English, and () points in English test.

A rectangular board with a length of 6 cm and a width of 4 cm has a corner cut off. Can you find its circumference? The circumference is () cm.

6. Two squares with a side length of 6 cm form a rectangle, and the circumference of this rectangle is () cm.

7. The bear hugged a bunch of toys and lost four more than he hugged. He lost two more when he was walking on the road. At this point, his loss is three times what he holds. How many toys are there in this pile?

8. There are 998 students in a primary school, including 238 boys, twice as many as girls. How many boys and girls are there in this primary school?

Xiao Ming has two five-dollar coins, four two-dollar coins and seven one-dollar coins. There are () ways to take out 12 yuan.

10, subtract the largest square from a rectangle with a length of 2 1 cm, and the circumference of the remaining part is () cm.

1 1. The teacher gave three children A, B and C five pens, and each child had to get a pen. There are () different ways to divide them.

12, 10000 continuously subtract 16. How many times is the difference 0?

13, can you fill in the appropriate symbols in the following numbers to make the equation hold?

1 2 3 = 1

1 2 3 4 = 1

2 2 2 2 2 = 3

2 2 2 2 2 = 4

2 2 2 2 2 = 5

14. How many ways can 12 be divided into the sum of three different natural numbers not greater than 7? Please list them one by one.

15. There are some watermelons in the shop. Half of them were sold on the first day, the remaining half on the second day and 30 on the third day. How many watermelons are there?

16. Some students plant trees in spring. If everyone plants 4 trees, there will be 10 trees left. If everyone plants 6 trees, there will be 20 fewer trees. How many people plant trees? How many trees have been planted?

17. Four years ago, my father was five times as old as Xiao Ming. This year, both father and son are 56 years old. How old is Xiaoming?

18, my son is 12 years old and my father is 36 years old. How many years later, the father is exactly twice the age of his son?

19, A, B and C each have several story books. If A gives B 5 books, B gives C 10 books and C gives A 15 books, there are now 35 story books for three people. How many copies do they have?

20.A businessman in A city has a donkey and 3000 carrots. If you want to pull carrots to city B, 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)

2 1、 1,3, 12,40,(? ) Guess what the fifth number is?

22. 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 is the way.

Hope to adopt ......