English joke: A math problem in arithmetic.

Bill is a good student and a clever boy. He likes studying arithmetic.

He can easily do all the arithmetic problems in the book. One day, on his way to school, Bill passed by a fruit shop. There is a sign on the window that says

"Apples-six for five cents." Bill had an idea. He went into the shop. "How much is the apple?" He asked the shop. "Six for five cents." "But I don't want six apples." How many apples do you want? "It's not a question of how many apples I want. It is an arithmetic problem. " "What do you mean by arithmetic problems?" The man asked. "well

If six apples are worth five cents

Then five apples are worth four cents.

Four apples are worth three cents.

Three apples are worth two cents.

O an apple is worth a penny, but an apple is worthless. I just want an apple.

If an apple is worthless, then I don't have to pay you. "Bill picked a good apple.

Start eating it

Then walked out of the shop happily. The man looked at the little boy in surprise and couldn't say a word.