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good math problem
The problem of filling numbers in the square table
Given a 9x9 square board. Please fill in the natural numbers from 1 to 81 in the table, so that each cell only...
The problem of frog jumping on water lily leaves
The frog sits on the leftmost water lily leaf, each step can jump over the next leaf, or one...
The problem of dividing a cake into two equal parts
The cake has a large rectangular shape, with a small defect as shown in the picture. With just one cut, you can find...
6th graders' cake division problem
The cake has a large rectangular shape, with a small defect as shown in the picture. With just one cut, you can find...
The math of intelligent lions
The 6th grade problem about lions trying to survive involves induction in Mathematics...
Two problems of counting triangles for international competition
With two problems of counting the number of triangles in an international exam with students in grades 6-7, you can solve...
The problem of filling numbers on rubik's faces of American university
Does the problem that appeared in an oral exam of the University of Washington (USA) in 2011 make it difficult for you? For a...
The problem of cycling on 4 circles
This is a movement problem in the 2007 International Math and Science Olympiad for students in grade...
The problem of finding the cat behind the door
The 5th grade problem asks the reader to calculate the number of times the door is opened to find the cat, knowing that after each...
