*Photo by RBerteig.*

Take a break from “serious” math and have a little fun today with some classics of recreational mathematics. Do you have a favorite math or logic fallacy? Please share it in the *Comments* below.

## Story Problem Fallacy

**Three Men in a Hotel Room**

From the comments section at Let’s Play Math! blog.

## Algebra Fallacies

**Classic Fallacies**

Can you find the false step in each of these “proofs”?**How to Double Your Salary Using an Algebraic Loophole**

Another version of the beginning algebra fallacy, from WikiHow.

## Geometry Fallacies

**Dissection Fallacy**

63 = 64 = 65 from WolframMathWorld.**What Is Wrong? (Rouse Ball’s Fallacy)**

A geometry “proof” from Cut the Knot.

## Edited to Add

I found this spoof of a famous number theory joke in my feed reader this afternoon…

**Proof: all April fools’ jokes are interesting**

“Let S be the set of uninteresting April fools’ jokes…”

Don’t miss any of *“Let’s Play Math!”*: Subscribe in a reader, or get updates by Email.

I suppose upon using this clock, we will get younger by the seconds. Hurray! I can rectify all the major mistakes made before using back the conventional clock…

LikeLike this

LOL! I wish it were so.

LikeLike this

Good way of telling, and nice piece of writing to obtain data

regarding my presentation topic, which i am going to convey in school.

LikeLike this