OK, similar to the $30 hotel thread. Some, or most of you might have seen this. Took me some time to figure it out myself.

Proof that 1=2

if
a=b then we multiply both sides by (a) and come to
a^2=ab now we ad (a^2-2ab) and get
a^2+a^2-2ab=ab+a^2-2ab or
2(a^2-ab)=a^2-ab now we divide both sides by (a^2-ab) to get
2=1 as the final answer.

What is wrong with this logic? Like I said, took me about 15 or 20 minutes of thinking and experimenting with numbers to find the problem.

Answer PMd.... but not the original answer. I've seen this one before, but never analyzed it in depth. Now I have.... :D

8 out of 11 - took me 90 seconds to see that you take advantage of mathematical property as opposed to any flouting of the laws of mathematics.

I've had 4 right answers so far. No wrong ones. I guess this was too easy.

Erm... I sent the identical paradox at the Paradox thread a month ago...

<font color="cyan">I'm drunk and even with my A-level in Maths, Im not even going to attempt it.</font>

Sorry Bozos. Guess I missed it. Glory goes to you then.

Aw heck, sorry if I sounded like a bastard, didn't mean to..
Anyways, I was just rebrowsing the threads, and noticed that it is not the problem I listed in the Paradox thread. I guess I just thought it was the same thing, just reversed, so I posted it. What I meant to say, is that people just might already know the answer because I posted it recently, that's all...
As for the problem itself, I think I see where it comes from, but I'm too damn lazy to calculate or test it... Nice stuff anyways!

<span style="color: lightblue">There is another version of this that works on the same principle. They only differ in one line. I learned this from my year 10 math teacher:
<span style="color: lightblue">Bozos, this could be the one you posted in the Paradox thread aswell. [img]smile.gif[/img]

<font color="cyan">Ah, now I'm sober I can see it!

So, mathmatically, 2=1!!!</font>

No. 2 does not = 1. That is the trick. You must find the mistake in the calculation.

PM'ed my answer...

Javan's right. Any other guesses?