Fun Mathy Type Riddles

[Edwardo Piet]

I don't know what that means! lol

I swear I have a love hate relationship with this stuff. It drives me crazy and I never get the answer but I love the process. I've tried so just tell me :p

I know there's an advantage to switching because there's a thread about this, but I'll never understand why.

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It is because, at first, your chance of hitting the right door is 1/3. So, if you stick with you originally chosen door, you have a 1/3 probability of being right.
When the guy gives you the option to switch, you automagically have 2/3 chance to get the right door.

An equivalent way to see it is to imagine you have 100 doors from where to choose.
You pick one and then the guy opens 98 doors that don't have the prize, leaving your door and another one closed. Should you switch your bet to that other door?
What are the chances that you got the door right on your first attempt? 1/100.
Now that you've been shown that 98 other doors have no prize, is the other door that the guy left closed the one with the prize, or yours?

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Wait is this the Monty Hall problem? That's my favorite problem ever.