I've got another door oriented one :

You die. (Starts off nicely doesn't it?) You've been somewhat good during your life but not good enough that you enter heaven automatically. God offers you a chance to get into heaven by choosing one of two doors :

- One leads to heaven and the other to hell.
- In front of each door, there is an angel.
- One of the angels always tells the truth, the other one always lies.
- The angel who tells the truth isn't necessarily in front of the heaven door.
- You can ask only ONE of the angels only ONE question.

What question do you ask to be 100% sure of picking the right door?

You ask angle 1 what angle 2 will say that angle 1 is standing in front of.

Whatever the answer is, the door is actually the opposite.

Good, good! Just curious... had you heard it before?

I'm a Math/Logic kind of guy. I made it through Calc 1,2,3, differential equations, abstract math, probability, statistics and Logic with solid A's. Hence why I keep posting math based questions, and really love this thread

Also, I've heard similar ones before, but I just thought about it for a few minutes. At first I almost gave the wrong answer.

EDITED

I'm a Web programmer here so math/logic problems are really something I love to do. I used to have a box of brainteasers called Mindtrap but I can't seem to find it anymore.

Yeah, you guys are correct. Guess I should have specified more clearly.
Anyway, this thread rocks.

I'm not very good at solving brainteasers (yet), but I love to try.

James recently moved to his first brand new house. When he arrived there he discovered that the builder had forgotten something. James popped down to the local DIY shop to enquire about the prices. Luckily the items are quite cheap at the shop. 7 cost £1.00, 10 cost £2.00 and 100 cost £3.00. What had the builder forgotten and how much will 210 cost?

@nord--how to do his F-in job

and it will cust the guy another 8

That`s an easy one, but I kinda like it. Here it goes:

The age of a girl is equivalent to the last two digits of the year she was born in. So is the age of her gandmother. How old is the girl and how old is her grandmother?

@mesoteto, it is not 8, and you didn't say what was missing.