Okay here's another one. An elderly King is dying but he doesn't know which of his 2 sons should be King after him. So his trusted adviser suggest his sons should have a horse race, whichever son's horse comes last, that son shall be King.
After 3 hours, the sons are still riding their horses and they are only half way to the finishing line. As the old King is quickly fading away, he wants to know which son shall become King. The adviser, goes up to whisper something in both sons ears.
Presently, they are racing hell for leather to cross the finishing line first. As the original point of the race is unchanged, what did the advisor say to the sons, so they are desparate to get across the finishing line first?????????