A book has 500 pages:
The 1st page says “Exactly 1 page in this book is false.”
The 2nd page says “Exactly 2 pages in this book are false.”
…
The 500th page says “Exactly 500 pages in this book are false.”
Can any of the pages be true?
Riddle AnswerAlice, Bob and Charlie are one of each type:
They make the following statements:
Alice: I am not a truth teller.
Bob: I am not a spy.
Charlie: I am not a liar.
What type is Charlie?
Alex came across 5 islanders, all of whom knew one another and would only answer yes-or-no questions.
What is the minimum number of questions Alex needs to ask, to successfully determine how many of the islanders are paladins?
Riddle AnswerTwo workers in a brewery are trying to settle an argument over how much beer is inside a barrel. One worker thinks the barrel is more than half full while the other says it’s less than half full.
How can they settle the argument without using any measuring tools?
Note: the top of the barrel can be easily removed.
Riddle AnswerMr. Smith has two children. At least one of them is a boy. What is the probability that both children are boys?
Riddle Answer