Einsteins Riddle Game - Free Online Flash Games Play Download. Expand your vocabulary! Lateral Thinking Puzzles - Preconceptions. Lateral thinking puzzles that challenge your preconceptions. 1. You are driving down the road in your car on a wild, stormy night, when you pass by a bus stop and you see three people waiting for the bus: 1.
An old lady who looks as if she is about to die. 2. An old friend who once saved your life. 3. The perfect partner you have been dreaming about. Knowing that there can only be one passenger in your car, whom would you choose? Hint: You can make everyone happy. Solution: The old lady of course! 2. Hint: The police only know two things, that the criminal's name is John and that he is in a particular house.
Solution: The fireman is the only man in the room. 3. Hint: He is very proud, so refuses to ever ask for help. Solution: The man is a dwarf. 4. Hint: It does not matter what the baby lands on, and it has nothing to do with luck. Solution: The baby fell out of a ground floor window. 5. Hint: His mother was an odd woman. 6. Hint: This has nothing to do with adoption or time travel. 7. Brain Teasers, Riddles and Puzzles. Puzzle Pirates. Puzzles by Eric C. Harshbarger. For my whole life I have been interested in puzzles and games, and in the last few years I have been fortunate enough to turn that passion into a profession.
I design all types of puzzles: paper-and-pencil brainteasers, physical/manipulative puzzles, number puzzles, riddles, and all-day scavenger hunts for people to explore. My work has been for companies all around the world. Puzzles of mine have appeared in the Perplexcity alternate-reality games (by Mind Candy), in Wired magazine, GAMES magazine, at Lone Shark Games events, in puzzle calendars, on-line treasure hunts, and so forth. I host annual puzzle parties where many of my initial puzzle ideas are play-tested by very patient friends. Ever so slowly I will detail some of my creations on this page. They illustrate the expansive variety of media and puzzle types with which I have been involved. If you are and individual or company looking for unique puzzles or games for any reason, contact me at email@example.com. Magazine. A Simple Guide to Cryptography.
Cryptography is an ancient mathematical science that was originally used for military communications, and designed to conceal the contents of a message should it fall into the hands of the enemy. Recent developments in cryptography have added additional uses, including mechanisms for authenticating users on a network, ensuring the integrity of transmitted information and preventing users from repudiating (i.e. rejecting ownership of) their transmitted messages. In today's world of electronic commerce on the Internet, the need for secure communications is obviously crucial. Cryptographic technologies provide enterprises with the best mechanisms of protecting their information, without putting the business at risk by exposing it on the Net.
What is Encryption? The safekeeping of keys, in other words their generation, storage and exchange, is of paramount importance to ensure the security of the data. Symmetric Cryptography – Secret Keys Asymmetric Cryptography – Public/Private Keys. Games for the Brain. Unsolved Problems. Ciphers & Puzzles. Index of free personality tests and intelligence tests.
The Perplexus Epic Is The Most Challenging Maze Around. The Superplexus. This is the three-dimensional spherical labyrinth that challenges the limits of your manual dexterity and spatial understanding as you maneuver a 5/8" wooden marble through its entire course. The Superplexus is a complex network of chicanes, multi-planar hairpin turns, spirals, and staircases--even a vortex. Hand made from 3- and 6-ply Finnish birch that form the track, over 400 hours are involved in its construction. The labyrinth is set inside a 36" diameter acrylic sphere affixed to a Jatoba base using a stainless steel gimbaled mount that allows you to tilt the sphere in any direction to guide the marble. The entire track laid out on a straight line is 31' longer than a football field. In addition to the track, the ball must travel on a 1/16" diameter stainless steel wire pathway at eight points along the journey.
30 Questions Guaranteed to Make You Think. Instead of giving you information that you want, I’m going to teach you something today by being indirect. Here’s the lesson: everything you need, every revelation I’ve had, and everything that I could possibly write about on this blog, ca n be found inside yourself. As in – with the proper thinking and questioning, you too can come to the conclusions that I’ve come to. You can help yourself instead of depending on me for help.
“But Brett,” you ask, “Won’t that render you obsolete? Won’t I, the reader, then be able to replace you?” No, not necessarily. However, the lesson I’m trying to teach you is not that you can become me, but that when you need something – an idea, the strength to carry through your will, or anything else – it can be found within.
To reach my goal for you, I’m going to ask you deep, philosophical questions that will test your thinking ability. These are designed to make you think. The Questions 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. Rubik cube solved in 20 movements or less. Brain Games & Brain Training. Sporcle.com: mentally stimulating diversions. Personality Tests.
List of paradoxes. This is a list of paradoxes, grouped thematically. The grouping is approximate, as paradoxes may fit into more than one category. Because of varying definitions of the term paradox, some of the following are not considered to be paradoxes by everyone. This list collects only scenarios that have been called a paradox by at least one source and have their own article. Although considered paradoxes, some of these are based on fallacious reasoning, or incomplete/faulty analysis. Informally, the term is often used to describe a counter-intuitive result. Logic Self-reference These paradoxes have in common a contradiction arising from self-reference.
Barber paradox: A barber (who is a man) shaves all and only those men who do not shave themselves. Vagueness Ship of Theseus (a.k.a. Mathematics Statistics Probability Infinity and infinitesimals Geometry and topology Some paradoxes - an anthology. Optical Illusions and Visual Phenomena. Test Your Brain With Brain Teasers and Games. Here you can enjoy the Top 25 Brain Teasers, Games & Illusions that SharpBrains readers (primarily adults, but some younger minds too) have enjoyed the most. It is always good to learn more about our brains and to exercise them!. Fun experiments on how our brains and minds work 1. You think you know the colors? Try the Stroop Test 2. You say you can count? 3. 4. Challenge your attention and memory 5. 6. 7. Optical illusions 8. 9. 10. 11.
Language and logic puzzles 12. 13. 14. 15. A few visual workouts 16. 17. 18. Teasing your pattern recognition and thinking 19. 20. 21. 22. Brain teasers for job interviews 23. 24. 25. The Tree of Logic. NIEHS Kids Page -- Optical Illusions. Very Difficult Analytical Puzzles. 3. The Fake Coin You have twelve coins. You know that one is fake. The only thing that distinguishes the fake coin from the real coins is that its weight is imperceptibly different. You have a perfectly balanced scale. What is the smallest number of times you must use the scale in order to always find the fake coin? Use only the twelve coins themselves and no others, no other weights, no cutting coins, no pencil marks on the scale. etc. These are modern coins, so the fake coin is not necessarily lighter. Presume the worst case scenario, and don't hope that you will pick the right coin on the first attempt.
Solution: 3. If you knew the fake coin was lighter, then the solution would have an easy explanation. Number the coins 1 through 12. 1. 1.1. 1.1.1. 1.1.2. 1.1.3 If (at the second weighing) coins 11 and 8 are lighter than coins 9 and 10, either 11 is light or 9 is heavy or 10 is heavy. 1.2. 1.2.1. 1.2.2. 1.2.3. Sliding Block Puzzles. The Hardest Logic Puzzle Ever.
The Hardest Logic Puzzle Ever is a logic puzzle invented by American philosopher and logician George Boolos and published in The Harvard Review of Philosophy in 1996. A translation in Italian was published earlier in the newspaper La Repubblica, under the title L'indovinello più difficile del mondo. The puzzle is inspired by Raymond Smullyan. It is stated as follows: Three gods A, B, and C are called, in no particular order, True, False, and Random. Boolos provides the following clarifications: a single god may be asked more than one question, questions are permitted to depend on the answers to earlier questions, and the nature of Random's response should be thought of as depending on the flip of a coin hidden in his brain: if the coin comes down heads, he speaks truly; if tails, falsely. History The solution Boolos provided his solution in the same article in which he introduced the puzzle.
Boolos' question was to ask A: Equivalently: If I asked you Q, would you say ja? Puzzles.COM Home. Laser.swf (application/x-shockwave-flash Object) Kuku Impenetrable Metal Ball Puzzle. Magic IQ Gift Box. Fiendish Japanese Pocket Puzzle. Isis Impossible Metal Puzzle. Revomaze Extreme Puzzle. Creativity Challenge . Creativity . PBS Parents. Educational Games @ nobelprize.org. IQ Matrix Blog: Accelerating Your Human Potential. NewMedia Puzzler.