"That's right, he's a fool, miss. If you gave him a five-ruble coin and a ten-ruble coin, he'd choose the five-ruble coin because he thinks it's bigger," said a boy. "Now, I'll show you something."
The boy took out two coins and gave them to Vova to choose from. Vova, as always, chose the five-ruble coin. The teacher, surprised, asked:
Why did you choose the five-ruble coin instead of the ten-ruble coin?
- You see, it's bigger, ma'am!
After school, the teacher came to see Vova.
- I don't understand that a 5-ruble coin is only bigger in size, but a 10-ruble coin can buy more things?
- Of course I understand, teacher!
So why did you choose the 5-ruble note?
Because if I choose 10 rubles, they won't give me any more money!




















