aha! Insight
Popularity 25
Contains puzzles that first baffle and then delight problem solving addicts. Grew out of a collaboration between Bob Tappay and Martin Gardner to enliven the learning of mathematics.
PuzzlesProblem solvingMathematical recreationsRecreatieve wiskundeProbleemoplossingPuzzles. 0Jeux mathématiquesMathématiquesJeux et récréations mathématiquesRésolution de problèmeDevinettes et énigmes31.99 mathematics: other