I got one. This is a bit complicated to explain and I havn't asked this for a while, so let's hope I explain this clearly, and this is real hard IMO....I could not think of the answer, let's hope you can.
So one day a person dies and 2 doors appeared in fron of him. One leads to heaven, and the other to hell. There are also 2 guardians, one an angel, one a devil, and each guards a door, however it is not known who is the angel and who is the devil, and the angel does not have to be guarding the way to heaven and vice versa. But all he knows is that the angel always tells the truth and the devil always lies.
The person is given one question to distinguish which way he wants to go in order to ascend to heaven. And he can only ask it to one of the guardians. What would that question be?
I'll give you a hint since this is really hard, firstly, it's a yes or no question. And doesn't matter who answers it, the person would know which way to go.
TP to whoever gets it before I go to bed (which is possibly about 30mins away).