You're in a room with 3 light switches. Next to your room is another room with the door closed. Inside that room are 3 lights. You do not know which switch controls which light. How can you figure out which switch controls which light? You can only enter the room with the lights once.
Henry walked down the street and bumped into his old friend from university. "I haven't seen you for ages! I've married someone you wouldn't know." said the young friend . "This is our daughter!" "And what's your name, girl?" Henry asked the little girl who was holding his friend's hand. "It's the same as my mummy!" Said the girl. "Oh so it's Teagan, is it?" Henry asked. He was right! How did he know the girl's name?
There are eight chairs around a table. There is a mom, grandpa, sister, brother, aunt, grandma, uncle, another sister, another mom, another brother, a dad, a father-in-law, a mother-in-law, another dad and one more uncle. They're all seated comfortably. How is this possible with only eight chairs?
Two trains are on the same railroad track; one is headed east the other west, they both leave the station at 1:00 and are travelling at the same speed. Yet they didn't crash into each other. How can this be?