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…”
Denise Gaskins' Let's Play Math 
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…
LOL! I wish it were so.
Good way of telling, and nice piece of writing to obtain data
regarding my presentation topic, which i am going to convey in school.