Can you start the fire using two pieces of wood?

How many words can a pen with half refill write?

What is the fastest way to double your money?

What is red and smells like blue paint?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

Guess the hidden movie name?

Jessica is telling her friends this story and asks them to guess if it’s the truth or a lie: “There was a man sitting in a house at night that had no lights on at all. There was no lamp, no candle, and no other source of light. Yet, he sat in the house and read his book happily.” Her friends say she’s lying, but Jessica corrects them and says she’s telling the truth. Jessica’s story is true—but how?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?