From Trick of mind site:
Today is Alice’s birthday. She turned 24. Alice is twice as old as Bob was when Alice was as old as Bob now. How old is bob now ?
See the result on http://trickofmind.com/2009/06/alice-and-bob.html
June 14, 2009
Trick of mind
March 1, 2009
World of Goo: Alice and Bob and the Third Party
World of Goo is a game developed by two guys. In game the player constructs intricate structures from intelligent globs of goo, with the deceptively simple goal of leading the remaining free members of the swarm to each level’s exit pipe. The gameplay is entirely physics based. It seems that now the Linux version is ready. Besides it’s an amazing game it also features an amazing 2nd level title too… “Alice and Bob and the Third Party”