Answer:
A prisoner is told 'If you tell a lie we will hang you if you tell the truth we will shoot you.' What can the prisoner say to save himself?
What's full of holes but still holds water?
I am a king who's good at measuring stuff. What am I?
I open to close but I close to open. I'm surrounded by water but I'm never soaking. What am I?
Never resting, never still. Moving silently from hill to hill. It does not walk, run or trot. All is cool where it is not. What is it?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.