In some part of this forum there was a link to silly math proofs such as 10 = 0, 2 = 1, 3 = 4 and so on. I've slightly modified one of those proofs in order to make it tricky to figure out what is wrong.(adsbygoogle = window.adsbygoogle || []).push({});

first of all, A --> B so A and B are almost equal. IIRC, ~ means something like almost equal so I will use it to relate the two.

A ~ B then multiply both sides by A

A^2 ~ AB then subtract B^2 from both sides

A^2 - B^2 ~ AB - B^2 then we factor both sides

(A + B) * (A - B) ~ B * (A - B) now divide both sides by (A - B)

A + B ~ B since A and B are almost equal, let's half ass simplify

B + B ~ B combine like terms

2B ~ B factor out B

2 ~ 1 what the heck?

At the step where both sides are divided by A - B, that isNOTa divide by 0 error. Since A and B are not exactly equal, that operation was perfectly legal.

So where is the flaw here?

**Physics Forums - The Fusion of Science and Community**

# Silly proof that 2 = 1? wtf?

Know someone interested in this topic? Share a link to this question via email,
Google+,
Twitter, or
Facebook

Have something to add?

- Similar discussions for: Silly proof that 2 = 1? wtf?

Loading...

**Physics Forums - The Fusion of Science and Community**