Description: This is a humorous and self-deprecating joke, which is used to test duck eggs. The teacher drew a big circle. On the whole, I got a big zero egg. I couldn't eat the duck eggs when they were not rotten or cooked well during the exam.

At that time, there were few goose eggs in the market, and they were all very big. Among geese, ducks and chickens, duck eggs and eggs are the most common in life. Duck eggs are larger, which is more in line with the appearance of 0. Use "big duck egg" to correspond to humorous "big zero egg"

Other interesting brain teasers

1, what has no limbs and only one head is lethal?

Answer and analysis: Brick (literally, there is only one word "head"; physically, it has only one head without limbs; if it is used to hit people, its lethality is definitely strong enough).

Even if you put the knife rest around your neck, you won't hold its hand tightly. What is this?

Answer analysis: cactus (cactus is notoriously full of thorns, no matter who it is, it will not be happy to hold its hand tightly).