Riddle: Two friends-Nora and Ashley-were going home after doing their weekly grocery shopping. Ashley began to complain about how heavy her bags were, and Nora responded, "If you gave me one of your bags, I'd have double the number of bags you have! And if I gave you one of mine, we'd have the same number of bags!". How many bags does each friend have?
Answer: Nora has seven bags, while Ashley has just five bags.
Riddle: You are a monster hunter. You know that werewolves either tell only truths or only lies. One day, you meet up with your friends-Daniel and Cameron-and ask if either one of them is a werewolf. Daniel says, "Cameron is a lying werewolf. And I'm a human,". And Cameron says, "Daniel is telling the truth,". Can you identify who is who?
Answer: You know that werewolves cannot tell half-truths, so Daniel's statements have to both be either true or false. If they are both true, then Daniel is a human, and Cameron is a lying werewolf. But then, Cameron is telling the truth, too. This contradicts Daniel's second statement. Therefore, both of Daniel's statements are false, and Cameron is also lying. It means that Daniel is a werewolf and Cameron is a lying human.
Riddle: Your spaceship lands on a foreign planet. A stranger in his workout clothes greets you to the entrance of the base. You go inside the base and wait for it to depressurize before removing your space suit. But before you get a chance to remove it, you get a message that someone at the base is an impostor. Who could it be–a man who covers his face because he has a sunburn, a woman with flaky patches all over her skin, or the stranger you saw earlier?
Answer: The stranger you saw earlier is an impostor because a human who is not wearing a spacesuit cannot survive outside of the base in the foreign planet's atmosphere, but this stranger somehow survived without his spacesuit.
Riddle: Shane is a young and talented scientist who always works in his lab alone. One day, he's found unconscious in his lab. Police officers question three other scientists. Ian claimed to be Shane's lab assistant, insisting that he would never hurt his lab partner. Travis said that he was doing research on a separate project. And Patricia said that she was cleaning the lab. Who hurt Shane?
Answer: Shane always worked in his lab alone, and he never had any assistants. Therefore, Ian lied about being Shane's assistant.
Riddle: When summer break ended, Mila told her friends about her vacation in Africa. Mila said, "Oh, it was great! But on the last day of my trip, a massive volcanic eruption happened; it didn't spoil my vacation only because I flew home that day,". Mila's friends didn't believe her. Why?
Answer: All flights must get canceled when a volcanic eruption occurs, so Mila couldn't have flown home on the last day of her vacation; she's lying.
Riddle: There are 10 fish in my fish tank. Suddenly, two of them drown, three of them swim away, and four of them die. How many fish are left in the tank?
Answer: There are still 10 fish left. For one thing, fish can't drown. Plus, none of the fish could have swam away because they're still in the tank.
Riddle: Two ladies were detained by security officers at an airport–one of whom claimed to be a computer scientist, and one of whom claimed to be a geographer. One of them was secretly a smuggler! A security officer asked the supposed computer scientist, "Do you know about the Gava computer program?". The woman answered, "Do you mean Java?". The security officer then asked the supposed geographer, "Have you ever been to the capital of Spain, that is, Granada?". The geographer said, "Yes! It's a beautiful city!". Who was the smuggler?
Answer: The capital of Spain is Madrid, not Granada. If the second woman was really a geographer, she would know this; she must be the smuggler!