A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside. The man said, "Oh! I am really sorry, I thought this was my room." He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man. What made her suspicious of that man? He might have been genuinely mistaken.

An evil man kidnapped someone and made them take one of two pills. One was harmless, but the other was poisonous. Whichever pill the victim took, the kidnapper took the other one. The victim took their pill with water and died. The kidnapper survived. How did the kidnapper get the harmless pill?

What do you get if you add 2 to 100 four times?

There is one four-digit whole number n, such that the last four digits of n2 are the original number n

What is the last thing you take off before bed?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

What two things can you never eat for breakfast?

Move three sticks of the spiral below to form a square.

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?