These are the best riddles and answers we have, as designated by user ratings of the riddles in our library. Representing some of the best riddles ever to grace the pages of the Internet, these puzzles and brain teasers are often some of the hardest riddles, best funny riddles, and best riddles for kids and adults alike. We let our users decide what they like, and we rely on them to help us produce and promote the best riddles possible. The rating given to our riddles is often based on difficulty and creativity of the riddle and its answer. Users will commonly give higher ratings to riddles that are hard; similarly, higher ratings are often given to riddles that have unique questions and answers. Many people like riddles that use intense logic and language play to tease the brain and intrigue the solver. So please try our best riddles, rate them, and leave your feedback by clicking the riddle and joining in on the discussion.
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Question: You have a flashlight that takes 2 working batteries. You have 8 batteries but only 4 of them work.
What is the fewest number of pairs you need to test to guarantee you can get the flashlight on?
Answer: 7. If you break the batteries into 3 groups: Two groups of 3 and one group of 2. By doing this you guarantee that one of the groups has 2 working batteries. Both of the groups of 3 have 3 possible combinations of 2 batteries and the group of 2 only has 1 combination. So, 3 + 3 + 1 = 7 tries at most to find two working batteries.
Question: A man leaves a $100,000 dollar bill on his desk and leaves work. When he returns the money is gone. He has three suspects: the cook, the cleaning lady, and the mail guy. The cook says he put the money under a book on his desk to keep it safe. They check and it is no longer there. The maid says she moved it when she was cleaning to the inside of the book between page 1 and 2. They open the book and look between page number 1 and 2 but it isn't there. The mail guy says he saw it sticking out of the book and to keep it safe he moved it to between page number 2 and 3. Once they are done the culprit is promptly arrested.Who did it and how did he know?
Answer: The mail guy did it because if he checked between page numbers 1 and 2 page numbers 2 and 3 are opposite sides of one page and could not hold the dollar bill.
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