Thread
:
What makes these two math tricks work?
View Single Post
#
41
08-28-2016, 01:02 PM
Leo Bloom
Member
Join Date: Jun 2009
Location: Here
Posts: 11,579
"Casting out nines": Wolfram Math:
http://mathworld.wolfram.com/CastingOutNines.html
For a mess of them:
"Divisibility tests": Wolfram Math:
http://mathworld.wolfram.com/DivisibilityTests.html
Last edited by Leo Bloom; 08-28-2016 at
01:02 PM
.
Reply With Quote
Leo Bloom
View Public Profile
Find all posts by Leo Bloom