Well it probably isn't the hardest riddle but... 80% of kindergartners got it right and 5% of Stanford graduates solved it..
Here's the riddle!
The word has seven letters.
Preceded God.
Greater than God.
More Evil than the Devil.
All poor people have it.
Wealthy people need it.
If you eat it,- you will die!
Try to figure it out! (Just something I found on teh internetz I don't even know if the information is correct, just going with what they are saying)