Brain Teasers and Puzzles
Exercise your brain with these user-submitted puzzlers!
661 topics in this forum
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How much does a fish weigh if it weighs 1 pound plus half its own weight?
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- 31 replies
- 7.9k views
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Okay here is one... 12,1,1,1,2,1,...,...,...,... What will be the next 4 numbers? Here is a hint. Its related to something you look at everyday.
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- 20 replies
- 5.1k views
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1800 1900 2100 2200 2300 2500 Spoiler = Hint [hide]You won't be able to solve this without "time and date" knowledge [/hide]
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- 4 replies
- 1.9k views
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Can anyone give me the result of 31 using F-I-V-E 3's ONLY Hint.... U can use any mathematical operators...
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- 3 replies
- 2.5k views
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In comes two legs, carrying one leg, puts it on three legs, out goes two legs, in comes four legs, picks up one leg, in comes two legs, picks up three legs, throws it at four legs. What the hell happend?
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- 12 replies
- 3.4k views
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SPOILER!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! If you don't want to have your working on the Has-Dick Test too be Spoiled... DON'T FOLLOW ON!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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- 6 replies
- 11.4k views
- 1 follower
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Found on the international high iq societies "test for exceptional intelligence" Does anyone know how to do these problems? http://www.highiqsociety.org/img/gif/iqtests/hd3.jpg http://www.highiqsociety.org/img/gif/iqtests/hd6.jpg If anyone has issues posting in public then leave me a private message. I have the test answers to a number of the questions. johny123
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- 9 replies
- 3.8k views
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Guarantee no one will solve it! Consider two breeding strategies of the fictional Furble. Dominator Furbles can fight for a breeding territory, and if they win, will be able to rear 10 offspring. An alternative is to share territory with another Furble which will allow each to rear 5 offspring. Sharers who attempt to share with dominators will be forced out of the territory, although they will be able to find a new territory. Assume sharers become extra cautious after encountering a dominator and so will always find another territory to share the next time around, but due to lost time will only be able to produce 3 offspring. Dominators are always able to force …
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- 36 replies
- 9.8k views
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Take your time and see if you can read each line aloud without a mistake: This is this taco. This is is taco. This is how taco. This is to taco. This is keep taco. This is a taco. These are idiot tacos. These are busy tacos. This is for tacos. This is thirty tacos. This is seconds tacos. Now go back and read the 3rd word in each line from the top to bottom.
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- 6 replies
- 2.4k views
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Kind of a philisophical question... If I was told to cool down a boiling glass of water as fast as I could, would it make sense to tip the water out and replace it with fresh cold water? One could argue that the origional water was still hot and now on the floor. There is physically nothing except for the difference of energy to separate the two samples. Is it possible to say that the new water is not the old water?
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- 12 replies
- 3k views
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You can read November's winning entries and take a peek at the latest magazine too... set your phasers to: http://www.null-hypothesis.co.uk Johnny
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- 0 replies
- 1.2k views
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When I was a teenager I drew mazes by hand when I was bored. Years later, I would draw them to relax (zen maze drawing anyone?) and eventually made an MS Word template to make printable mazes. Okay, so here's a shot of one from about five years ago (I can't find the template right now). Have fun.
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- 8 replies
- 3k views
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The thing you'll be doing in the next few minutes: Find a 9-digit number(natural) that has exactely one 3, one 7, one 8 and no 0's in it and when 3 is deleted the number is dividable by 78. When 7 is deleted the number is dividable by 38. When 8 is deleted the number is dividable by 73.
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- 0 replies
- 1.3k views
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Another month, another picture... Read last month's winners and have a go at the latest caption. http://www.null-hypothesis.co.uk JohnS
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- 0 replies
- 1.4k views
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You can buy 1 for 5 dollars, 21 for 10 dollars and 321 for 15 dollars. What are they? Spoiler: [hide]The Brass Numbers for an address.[/hide]
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- 1 reply
- 1.5k views
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There are five houses in a row in different colors. In each house lives a person of a different nationality. The five owners drink a different drink, smoke a different brand of cigar, and keep a different pet, one of which is a Walleye Pike. The question is: Who owns the fish?? Hints: The Brit lives in the red house. The Swede keeps dogs as pets. The Dane drinks tea. The green house is on the left of the white house. The green house owner drinks coffee. The person who smokes Pall Malls keeps birds. The owner of the yellow house smokes Dunhills. The man living in the house right in the center drinks milk. The man who smokes Blends lives ne…
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- 4 replies
- 3.2k views
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FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS. Now count aloud the F's in that sentence. Count them ONLY ONCE; do not go back and count them again. How many did you count?
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- 10 replies
- 2.9k views
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Another month's caption to have a go at. Have a look at last month's winners and look at the current mag too... http://www.null-hypothesis.co.uk Thanks, D
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- 1 reply
- 1.5k views
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can you guys help Posted: Sun May 15, 2005 12:31 pm Post Subject: pub question -------------------------------------------------------------------------------- a pint rests on the correct answer to this one a 400 gallon water tank fitted at say 20 feet up ona a wall has two pipes coming from the bottom. one is 15mm the other is 40mm diameter the pipes run verticaly down the wall to the floor, at the floor each has 2 90 degree bends (to make a u shape) the tank then has a plug put in each pipe, plugs are chained together. tank is the filled with water when full, chain is pulled (so both plugs are removed at same time) question.…
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- 16 replies
- 3.3k views
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Have a go at the latest caption competition, and read last month's winning entries... http://www.null-hypothesis.co.uk While you're there, don't forget to have a look through the mag! John
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- 0 replies
- 1.3k views
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This is a little fun thing that I have found to be a little tricky. Read what COLOR it is, not the WORD Blue Black Yellow Green Red Grey Purple Pink
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- 20 replies
- 8.1k views
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I encrypted a sentence... Can you figure it out? 0602280050304200063602062200401618380006300810
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- 4 replies
- 2.1k views
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Thanks for July's efforts - pretty cool! Have a go at the latest caption competition, and read last month's winning entries... http://www.null-hypothesis.co.uk John
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- 3 replies
- 1.8k views
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It's not actually a specific puzzle here, but a type of puzzle game I recently heard of that I suspect some here would enjoy (I know I have). Sudoku is a Japanese number-game that is evidently very popular over there and catching on in the UK. It's basically just a 9x9 matrix, subdivided into 9 3x3 matrices. There are "givens" scattered all over it. Using these givens and pure logic (no guessing is needed), you can find every value by utilizing 3 rules: 1) each 3x3 matrix contains only 1 instance of each digit from 1 to 9 2) each row contains only 1 instance of each digit from 1 to 9 3) each column contains only 1 instance of each digit from 1 to 9 Thus, …
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- 5 replies
- 3k views
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