1 When the mathematician Gauss was in high school, the teacher gave him a problem. It took him one night to work it out. Then he came to school and asked the teacher, only to know that the problem was accidentally caught by the teacher. That's a mathematical problem in the world, which has puzzled mathematicians 100 years.

2. Gauss, in primary school, in order to punish students, the teacher asked them to calculate 1 and add it to 100. When everyone else wants to add, Gauss uses the method that both the beginning and the end of the number are equal to 10 1, which is quickly calculated.

3. Mathematician Chen Jingrun walked and thought, bumped into a tree trunk and said "I'm sorry, I'm sorry" without looking up.