In order to get out of the dungeon, you must perform a service for the king. He wants you to identify the one counterfeit among twelve coins, but you can only use his scale three times to do it. Lucky for you, you are the kingdom's top mathematician. I can slice a tomato into 18 pieces with five cuts, but this one's a real head scratcher.
Jennifer Lu sure came up with a hard one in this riddle. I might have been able to figure it out, if I had infinite time and no stress, but the scenario as it is would not allow for that. The king has a temper, you know. -via Geeks Are Sexy