Tag: birthday

  • Cheryl’s birthday – solution

    (Read the problem here)   To get conclusion of the problem, we have three important information from Albert and Bernard’s conversation: Albert knows that Bernard does not know Bernard knows the answer after point 1 is known Albert knows the answer after point 2 is known   So here we have initial options: May 15          …

  • Cheryl’s Birthday part 2 – solution

    In the annoying Cheryl’s birthday problem part 2 (go here if you haven’t read it), we have additional member; David. So it’s getting more complex than the previous one.   And here is my answer: (apologize ahead for grammatical errors)   To get the conclusion of the problem, we have seven important points from the…

  • Cheryl’s Birthday part 2

    Seriously, Cheryl is so annoying. Not only she plays hard to get, she changes her birthday! Ok, this is another puzzle about Cheryl’s birthday. There’s an additional member here; David.   Albert, Bernard, and David just became friends with Cheryl, and they want to know when her birthday is. Cheryl gives them a list of…