You need to check that your friend, Bob, has your correct phone number, but you cannot ask him directly. You must write the question on a card and give it to Eve who will take the card to Bob and return the answer to you.
What must you write on the card, to ensure Bob can encode the message so that Eve cannot read your phone number? Riddle Answer
There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way.
Where can you place an apple so that all but one person can see it? Riddle Answer
A man went into a party and drank some of the fruit punch. He then left early. Everyone at the party who drunk the fruit punch subsequently died of poisoning. Why did the man not die? Riddle Answer
A serial killer kidnapped people and made them take 1 of 2 pills: one was harmless, and the other was poisonous.
Whichever pill a victim took, the serial killer took the other one. The victim took their pill with water and died. The killer survived.
How did the killer always get the harmless pill? Riddle Answer
A man pushes his car and stops in front of a hotel and immediately goes bankrupt. What is he doing? Riddle Answer