Bill is a good student and a smart boy. He likes to study 1, and he can do all of the maths problems in his book easily.
One day on his way to school, Bill passed a fruit store. There was a 2 in the window which said, "Apple-six for 5 cents （美分） ." An idea 3 to Bill and he went into the store. "How 4 are the apples?" he asked the store.
"Six for 5 cents."
"But I don't want six apples."
"How many apples do you want?"
"It is not a question of how many apples I want. It is a maths problem."
"What do you 5 by a maths problem?" asked the man.
"Well, if six apples are worth(值）5 cents, then five apples are worth 4 cents, four apples are worth 3 cents, three apples are worth 2 cents, two apples are worth 1 cent and one apple is worth 6 . I only want 7 apple"
Bill 8 a good apple, began to eat it and walked 9 out of the store. The man looked at the young boy with such 10 that he could not say a word.
