English Original
- What is black when it's clean and white when it's dirty?
- What can you place in your right hand that you can't place in your left hand?
- What will get smaller if you turn it upside down?
- What is taller sitting down than standing up?
中文翻译
- 什么东西干净时是黑的，弄脏了反而是白的？
- 什么东西只能放在右手不能放在左手？
- 什么东西倒过来会变小？
- 什么东西坐着比站着高？
Answers / 答案
- A blackboard. (黑板)
- Your left elbow. (你的左肘)
- Lots, e.g., 9, 99, 991, 999... (很多，例如数字9，99，991，999...)
- A dog. (一条狗)
Note: For question 3, "turn it upside down" means to invert it, which makes numbers like "9" look like "6" and thus appear smaller.
注： 对于问题3，“倒过来”指的是上下颠倒，这使得像“9”这样的数字看起来像“6”，因此显得更小。