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 AnswerA 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 AnswerA man pushed his car. he stopped when he reached a hotel at which point he knew he was bankrupt. Why?
Riddle AnswerLook at the 9 dots in the image. Draw 4 straight continuous lines without lifting the pen from the paper and make sure that the lines pass through each of the nine dots.
