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
- 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.
- 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…”