Why do people never feel hungry on a beach

腦筋急轉彎最早起源於古代印度。就是指當思維遇到特殊的阻礙時，要很快的離開習慣的思路，從別的方面來思考問題。現在泛指一些不能用通常的思路來回答的的智力問答題。腦筋急轉彎分類比較廣泛：有益智類，搞笑類，數學類，成人類等。 腦筋急轉彎是種娛樂方式，同時也是一種大衆化的文字遊戲。

1、Why do people never feel hungry on a beach?

2、What's the difference between a monkey and a flea?

3、What hangs on the wall without nail or string?

答案：

1、Because of the sand which is there

2、A monkey can have fleas but a flea cannot have monkeys

3、Cobweb