Carmen Sandiego Adventures in Math: The Case of the Crumbling Cathedral

Bad news, detective! There's trouble in Moscow, Russia in Carmen Sandiego Adventures in Math: The Case of the Crumbling Cathedral. St Basil's Cathedral has disintegrated! All that's left is a giant pile of sand. The Chief wants ACME's best agent on this case, and that means you, detective. Get to Moscow fast and find out what's going on before any more monuments turn into giant sand castles.