I can prove why 1 = 2

* Lets say y = x
* Multiply through by x xy = x2
* Subtract y2 from each side xy – y2 = x2 – y2
* Factor each side y(x-y) = (x+y)(x-y)
* Divide both sides by (x-y) y = x+y
* Divide both sides by y y/y = x/y + y/y
* And so… 1 = x/y + 1
* Since x=y, x/y = 1 1 = 1 + 1
* And so… 1 = 2

How is this possible ?

At a restaurant downtown, Mr. Red, Mr. Blue, and Mr. White meet for lunch. Under their coats they are wearing either a red, blue, or white shirt.Mr. Blue says, ‘Hey, did you notice we are all wearing different colored shirts from our names?’ The man wearing the white shirt says, ‘Wow, Mr. Blue, that’s right!’
 
Can you tell who is wearing what color shirt?

I organized a small get together at my home. 
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say ‘I bet this barrel of whiskey is more than half full’.
‘No, its less than half full’ Guest 2 replied.

I don’t have any measuring instrument and without removing whiskey from it ,
how can i determine which of the guest is right ?

There is a bag which have 21 blue balls and 23 red balls. You also have 22 red balls outside the bag.

Randomly remove two balls from the bag. 
* If they are of different colors, put the blue one back in the bag. 
* If they are the same color, take them out and put a red marble back in the bag. 

Repeat this until only one marble remains in the bag. 

What is the color of the sole marble left in the bag ?