When Gauss was three years old in the summer, when he was about to get paid, Little Gauss stood up and said, "Dad, you are mistaken." Then he said another number. It turned out that three-year-old Gauss was lying on the floor, secretly following his father to calculate who to pay. The results of recalculation proved that little Gauss was right, which made the adults standing there dumbfounded.

Cauchy/Kloc-went to middle school directly at the age of 0/3, and also actively participated in the competition, winning many prizes, but actually participated in the Latin and Greek competitions!