Oct 23, 2014 07:19 PM
(This post was last modified: Oct 23, 2014 07:21 PM by Magical Realist.)
This question was asked by late puzzle master Martin Gardner:
"Imagine heating a metal ring enough so it expands. What happens to the hole, does it get bigger or smaller?"
![[Image: 275-1024-washer-steel.jpg]](http://www.vexrobotics.com/media/catalog/product/cache/11/image/296x/5e06319eda06f020e43594a9c230972d/2/7/275-1024-washer-steel.jpg)
[Image: 275-1024-washer-steel.jpg]
"Imagine heating a metal ring enough so it expands. What happens to the hole, does it get bigger or smaller?"