阅读理解

Sam is 10 years old. His favorite subject is math. And he does well in it.

One day, when Sam goes to school, he sees a fruit store. On the door of the fruit store. it says "Apples (主意) comes to Sam and he goes into the fruit store. A man is in it. "How much are the apples?" He asks the man.

"Six for five yuan, boy, " the man says.

"I don't want six apples. I only need one," Sam says.

"Only one?" asks the man.

"Well, if six apples are five yuan, then five apples are four yuan, three apples are two yuan. So one apple isfree. Now I only want one apple. and I don't need to pay (支付) for it. "Sam says.

Sam gets an apple and eats it. Then he walks out of the fruit store. The man in the fruit store looks at Sam and doesn't know what to do.