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Mangahigh
Mangahigh: A Tangled Web: Angles, From Basic Rules to Circle Theorems
For this game, you must solve tricky angle problems as you help Itzi the robotic spider find a way through a maze of tangled webs, to rescue his family and then get back to his home. Includes a helpful tutorial.
University of Cambridge
University of Cambridge: Nrich: A Magical Number Maze!
On this one page website sharpen your logic and problem solving skills while working on this challenge. The solution is available to double check your solution.