Here is the puzzle, I address with this block:
Can you guess a birthday (just 1 out of 366 days, i.e. no year)
under the following conditions:
- just ask 9 yes/no questions
- all questions must be independent, i.e. one question must not depend on an answer of a previous question
- answering the questions should be straight forward, i.e. any 6-year old kid can answer them
(unshuffled version)