The teacher noticed that Johnny had been daydreaming for a long time. She decided to get his attention. "Johnny," she said, "If the world is 25,000 miles around and eggs are sixty cents a dozen, how old am I? "Thirty-four," Johnny answered unhesitatingly. The teacher replied "Well, that's not far from my actual age. Tell me...how did you guess?" "Oh, there's nothing to it," Johnny said. "My big sister is seventeen and she's only half-crazy."
老师注意到约翰尼走神很久了，她决定吸引他的注意力。“约翰尼，”她说，“如果地球的直径是25,000英哩，鸡蛋每打买60美分，那么我多大？” “三十四，”约翰尼毫不犹豫地回答。 老师答道，“嗯，那与我的实际年龄差不多。告诉我...你是怎么猜到的？” “噢，这没什么。”约翰尼说，“我的大姐是17岁，而她有一半疯狂。”