Every 108 minutes, the button must be pushed.
Don't hit the walls, or you'll sink!
Press and hold the button for a long as you can endure. You might even get on the leaderboard!
It doesn't matter how much you push the envelope. It will still be stationary.
A shopper walks into a store, looking to buy a certain mystery item. When he asks about the price, he is told that 8 will cost $0.50, 64 will cost $1.00, and 4096 will cost $2.00.
What on earth could this mystery item be?
Travel through all the doorways exactly once.
Add a single toothpick to form a mathematically true equality.