The conversation between human and AI assistant.
You have a 100 coins laying flat on a table, each with a head side and a tail side. 10 of them are heads up, 90 are tails up. How would you split the coins into two piles such that there are the same number of heads in each pile?
How about a riddle?
Okay, here's a riddle for you: What has a heart that doesn't beat?