Math enthusiasts and riddle gurus are sure to love a mind-bending puzzle involving a king, a scale, and a counterfeit coin. Middle and high schoolers work through a video that describes a mathematician's challenge to find a false coin in...

Riddle me this. The world's rarest fish has been stolen. Who done it? Challenge your young sleuths to tackle Einstein's Riddle and come up with the culprit before being shown the solution.