What kind of soda you must not drink?

What question could never be answered "yes"? 
Show Answer            Hide AnswerAre you sleeping?

 

You stand at a fork in the road. Next to each of the two forks, there stands a guard. You know the following things: First that one path leads to paradise, the other leads to Death. You cannot distinguish between the two paths. You also know that one of the two guards always tells the truth and the other always lies. You have permission to ask one guard one question to discover which path leads to paradise. What one question would you ask to guarantee you take the path to paradise?
Show Answer            Hide AnswerAsk one of the gaurds 'Which door would the other guard say leads to paradise?' If you ask the truthful one he will say the lying guard would say the wrong door. If you ask the lying guard he would say the truthful gaurd would pick the wrong door as well (since he is lying). So no matter what you could choose the door opposite of what they say and end up in paradise.

 

There are a few trees in a garden. On one of them, a pear tree, there are pears (quite logical). But after a strong wind blew, there were neither pears on the tree nor on the ground.
How come?
Show Answer            Hide AnswerAt first, there were 2 pears on the tree. After the wind blew, one pear fell on the ground. So there where no pears on the tree and there were no pears on the ground.

 

What kind of soda you must not drink?
Show Answer            Hide AnswerBaking Soda.

 

A natural state, I'm sought by all. Go without me, and you shall fall. You do me when you spend, and use me when you eat to no end. What am I?
Show Answer            Hide AnswerBalance.

 

A time when they're green, a time when they are brown, but both of these times, cause me to frown. But just in between, for a very short while, they‘re perfect and yellow, and cause me to smile! Who am I?
Show Answer            Hide AnswerBananas.

 

To look cool wrap me around your head. Remove a letter and eat me instead. What am I?
Show Answer            Hide AnswerBandanna. (actually 2, but close enough).

 

Why didn't the skeleton cross the road?
Show Answer            Hide AnswerBecause he didn't have the guts.

 

Why did the chicken cross the road, roll in the dirt and cross the road again?
Show Answer            Hide AnswerBecause he was a dirty double crosser.

 

Why was the music teacher not able to open his class room? 
Show Answer            Hide AnswerBecause his keys were on the piano.