William put up his hand.
"Yes, William," said the teacher. "Is there something about the sum you don't understand?"
"Please, sir," said William. "Is the answer 23?"
The teacher was very, absolutely, totally, completely amazed.
"How did you work out the sum so quickly?" he gasped. "It's impossible!"
"Nothing is impossible," said Mr. Impossible from the back of the class, and stood up.
"Well I never did," exclaimed the teacher.
相關推薦：
小升初試題、期中期末題、小學奧數(shù)題
盡在奧數(shù)網(wǎng)公眾號
歡迎使用手機、平板等移動設備訪問幼教網(wǎng)，幼兒教育我們一路陪伴同行！>>點擊查看
