I am trying desperately to remember a game I used to play on our old Mac. It was black and white, and you played through a castle by solving math problems...you had to solve problems to get through the gate, and when you got to the end you collected treasures and you could have a whole room full of treasures. Does ANYBODY know what it was called?
Thanks 
Treasure math storm? Or Treasure mountain? I'm pretty sure those are already here.
I would have said "Castle of Dr Brain" but it's colour. It came on 4 floppies.
Most of the Super Solvers series of games follow that pattern: http://www.mobygames.com/game-group/super-solvers-series
I know what it is! Number Maze. Great Wave Software. I remember in the late 1990s, a school-distributed software catalog had "Number Maze Gold".
