Perfect Times Teaches and assesses fluency of multiplication and division tables using online cards. Submit data and compare results. http://www.perfect-times.co.uk/ Perfect-times.co.uk~Site InfoWhoisTrace RouteRBL Check
Mixed Up Math Logic problems, where equations are mixed up. In various formats like boxes, crosses, diagonals, mazes. Free download. http://www.kprobe.com/kprobe/mu.htm Kprobe.com~Site InfoWhoisTrace RouteRBL Check
Wu's Riddles A collection of riddles, puzzles, and technical interview questions, with a discussion forum. http://www.ocf.berkeley.edu/~wwu/riddles/intro.shtml Berkeley.edu~Site InfoWhoisTrace RouteRBL Check