True or False?
"This sentence is false." Is the sentence true or false?
Hint: If the sentence is true, it is telling the truth that it is false. If it is false, it is lying that it is false so it is really telling the truth.
Solution: Unfortunately, there isn't really a good solution. Whether the sentence is true or false, a paradox is created. A similar question is, "If a man tries to fail and succeeds, which did he do?"
Games
Reset the Sign
The longer you wait to reset the sign to zero, the higher your score. But don't wait too long, or someone else might reset it!
Land the Boat
Don't hit the walls, or you'll sink!
Hold the Button
Press and hold the button for a long as you can endure. You might even get on the leaderboard!
Pac-Man Made Easy
Because being chased by ghosts is way too hard.
Puzzles
Toothpick Squares
Move two toothpicks to form exactly four squares instead of five.
Connect the Dots
Draw four straight lines, without lifting your imaginary pencil, that touch all nine dots in the grid.
Toothpick Equality
Add a single toothpick to form a mathematically true equality.
Doorways
Travel through all the doorways exactly once.