In the story with his teacher, why is the teacher said to have a good knowledge of mathematics?

At the beginning in Zhihu to answer ()?

Wow, see this problem! Although I still can't help but want to answer after many years! "Some people seem to be born to prove the existence of genius."

In fact, this story is not completely true. According to the research of Bell, a famous mathematical historian, the topic given by Gauss's teacher Butner at that time was: 81297+81495+81693+…+100899 (the tolerance is 198, and the number of items is

When Butner finished writing the topic, Gauss also worked out the answer and handed in the slate with the answer.

It's ... he seems to be ten years old! Storm crying

By the way, the ruler diagram of positive deformation 17 was also proved by Gauss, when it was only 19 years old.