The Ming Dynasty avatar only knew odd numbers, not even numbers. Why don't they know when they lose a piece of gold?

There was a prodigy in the Ming Dynasty. He could recite the preface of the university when he was five years old. One word he missed was because he was afraid of his father's name. Later, he became a successful Xie Yuan and became a famous calligrapher and bibliophile. But there is something strange about this man. He only knows odd numbers but not even numbers, so that he can find one piece when he loses gold, but he doesn't know two pieces. Why?

Feng Fang was really smart since she was a child and had a great talent for learning. The preface to the Lanting Pavilion, which he once copied, was even considered to be a reprint of the original, which was a sensation!

But he's also confused. At that time, there was a servant in their family who was very cunning. At that time, he asked Feng Fang to take out the books and gold wares to dry, otherwise they would get moldy. Feng Fang thought he was right and agreed. So he asked his servant to count the gold wares himself. The servant secretly took one himself. When she moved back in the evening, Feng Fang found that one was missing, so she ordered the servant to hand it over quickly. The servant was not only not afraid, but also took one from it. Feng Fang counted it again and said it was not bad. How can such a smart person be so confused?

In fact, it is not surprising that Feng Fang is a master of arts according to the current liberal arts, but a scum for science. In addition, he devoted his life to literature and knew little about mathematics, so his sensitivity to numbers was very low.

? ? Feng Fang's family had always belonged to a well-off family, but in his later years he was too poor to even have a place to live. Fortunately, the temple took him in, but once he was drunk, he was still studying when he came back, and then he fell asleep. Because he didn't blow out the candles, he burned all his buildings.