1, three characteristics of age problem

2. The problem of planting trees

3. The problem that chickens and rabbits are in the same cage

4, profit and loss problem 6, the average problem.

7. Number of cycles

8. pigeon nest principle

9. Knowledge points of Olympic Mathematics (define new operation)

10, principle of addition, subtraction, multiplication and division and geometric counting

1 1, prime numbers and composite numbers

12, divisor and multiple

13, divisible

14, remainder and its application

15, the application of fractions and percentages

16, comparison of scores

17, ratio and proportion

18, comprehensive trip problem

19, engineering problems

20, logical reasoning problem

2 1, geometric area

22, the clock problem-the problem of fast and slow table.

23. Clock problem-clock face catching up

24, concentration and proportion

Economic issues

26, simple equation

27. Cyclic decimals

Mathematical competition is one of the effective means to discover mathematical talents. Mathematics competition in the modern sense began in Hungary. Most of the winners of some major mathematics competitions have made great achievements in their later careers. Therefore, all developed countries in the world attach great importance to mathematics competitions. In the past ten years, mathematics competitions in middle schools in China have developed vigorously, with increasing influence. In particular, middle school students in China have been among the best in the most influential and highest-level international mathematical olympiad for many times, and their achievements have attracted worldwide attention, fully demonstrating the intelligence and mathematical ability of the Chinese nation. It is necessary and beneficial to show one's intelligence and know about the competition situation in China through mathematics competition.