What treat is never on time?
What time is it when the clock strikes 0?
If it takes eight men ten hours to build a wall, how long would it take four men?
Every time you lose something, you always find it in the very last place you would look. Why is this?
There is a puzzle which can be asked all day with a different correct answer each time. What is the puzzle?
What flies without wings?
What can always be measured but never can be seen?