There are many interesting mathematics. Here are two examples I met when I was a child:

1, the cucumber bears the burden and the doll sits in the yard. One person is missing, and one person is half and half. How many children and cucumbers? (Answer: 2 cucumbers and 3 children)

Grandma sells eggs. She sold half the eggs and cooked half the eggs for the first time. The second time, she sold the remaining half and built half. The third time, she sold the remaining half, and when she built half, it was sold out. Q: How many eggs does Grandma have? (Answer: 7)