Well, its quite hard to say which of the question will be the hardest. There are medical questions out there that has answers but does not necessarily have the solution. Our knowledge can pretty much explain a lot of things in the medical world but a lot of things that happens (like diseases) to people where the medical field does not have the solution to.
This question is the hardest question to answer.
the hardest i can think of is "What is the answer to this question?"
is there a god. that's the hardest science question!
The hardest question is too difficult to conjure.
This very question itself, my friend, is the hardest question in the world.
Now that is a HARD question!
the hardest question to ask is as follows, Mr. 'Blank', may I have your permission to marry your daughter?
This question!
The hardest rock is PANTERA, or Diamonds. Depending on your question.
ummmmmmmmmmm :] its a opinion! :]
Do you have an STD.
Fineeeeeeeeee