Is your elementary school youngster struggling with math? Are they a visual person? Would math games and videos help them learn? Enter Math Playground, to assist with problem solving and real world math. Try the enticing logic game Sugar, Sugar or beef up your math word problem skills. There are plenty of games to help educate while entertaining.
posted by netbros on Sep 4, 2012 - 14 comments

92 years young, the delightful Raymond Smullyan is a mathematician, logician, magician, concert pianist, and Taoist philosopher - who also pioneered retrograde chess problems.
posted by Trurl on Jun 26, 2011 - 22 comments

DroidQuest, Gate and Logicly are modern logic puzzle games based on the classic educational games Rocky's Boots (1982) and Robot Odyssey (1984). [more inside]
posted by speicus on Nov 2, 2009 - 22 comments

A virtually unlimited supply of randomly-generated logic puzzles, in a variety of sizes and difficulties: Nonograms. Slither Link. Nurikabe. Bridges. Light Up.
posted by Upton O'Good on Nov 28, 2007 - 18 comments

Arghhhhh!!! Aghhhhhhhh! Arghhhhhhh!!!

Cheats for PuzzleDonkey4 Available here
posted by willnot on Dec 1, 2004 - 55 comments

"WARNING!!! The puzzles on this site are very difficult, and most require the use of a good spreadsheet program in order to solve them. It will take many hours, perhaps days, to solve each puzzle..."
posted by limitedpie on Aug 11, 2004 - 7 comments