1. [5th & 6th Grade] University of Tokyo Entrance Exam Problems Solved with Elementary School Math | "Prove that Pi is Greater than 3.05"

The entrance exam for the University of Tokyo is said to be the most difficult in Japan. In its mathematics section, there ...

[5th/6th Grade] You cannot make a 'regular pentagon' no matter how you cut a cube | 3 rules to solve cube cutting problems for middle school entrance exams

Cutting a cube is a topic where many children stumble in middle school entrance exam math. But in fact, just by understanding ...