Brain Teasers and Puzzles

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Make an equation out of these numbers and symbols. You may only use each once. 2 3 4 5 + =

Why the professor says "if"?

http://www.stoveinafield.com/ Verry hard puzzles, well worth a go.

"What the Tortoise Said to Achilles" by Lewis Carroll: http://www.ditext.com/carroll/tortoise.html What exactly is wrong with the logic here? Is anything wrong at all?

Hi all, a local magician/illusionist/mentalist in my country made a prediction about 2010 FIFA World Cup Winner. He made the prediction while he's isolated for 12 hours inside a dome made of ice build on a ice-skating rink. After he got out of the dome, he put the prediction inside a box with locks, witnessed by legal representatives and of course the audience. Then he hung the box outdoor about 50 metres high so everyone can see that no one can alter what's inside. He's going to open the box and reveal the prediction after the World Cup Final on July 11th match. In the meanwhile, he tweeted a cryptogram that he claims to be a country's name of the World Cup winner and he…

1,3,4,5,6,7,9,1,2,3,4,6 what 3 #'s come next??? use a calculator if u have to, you may need one Also,once u figure it out u may also explain it so that the next guy that looks at this won't have to ask me, who made the pattern, but the champion who solved it.

heres a puzzle my math teacher gave me a few years back. you just have to figure out what the next line will be. 1 11 21 1211 111221 312211 13112221 if you figure it out post the next line without giving the secret, i wanna see how long it can get

List 10 UNIQUE types of metal. Example: Iron Hint: Do not underestimate the easy ones.

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.

1. A box contains 12 balls of three different colors. 4 each of red, yellow and blue. If you were to be blindfolded and asked to pick them at random, How many balls must you pull out to be sure that there are at least two of one color among the balls picked out? 2. In a training academy, Mark is the 50th fastest and the 50th slowest runner. Assuming no two runners, run at the same speed, how many runners are in Mark’s academy? 3. Benjamin had locked his suitcase with a 3-digit numerical code. He normally forgets his codes, so he wrote some clues indicating the what the code was. Can you crack the code based on the 5 clues written below by Benjamin? Cl…

SPOILER!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! If you don't want to have your working on the Has-Dick Test too be Spoiled... DON'T FOLLOW ON!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

A friend has sent this question to me. I have it solved with linear algebra (and some hand waving). Can you find a shorter way to the answer? (It's not a homework, not mine anyway. My homework times long gone.) A gardener collected 17 apples. He finds that each time he removes an apple from his harvest, he can share the remaining fruit in two piles of equal weight, each containing 8 apples. Show that all apples are the same weight.

2 easy math riddles... i know the answers but i'm not telling! 1) You are using the scales on the left picture... You have 9 coins. One of them is fake and weighs lighter then the other ones. After using the scales only twice, how do you figure out which coin is fake? 2) You are using the scales on the right picture (with exact amount)... You have 10 stacks with 10 coins each. 9 of the stacks are real, and contain coins that weigh 1 gram each. 1 of the stacks is fake and contains coins that weigh 1.1 grams. After using the scales only once, how do you find the fake stack?

Question: A man is twenty years old but has only had five birthdays. How is that possible? Question: There is an ancient invention still used in some parts of the world today that allows people to see through walls.What is it?

101 121 314 516 and the other is: WITNLIT_ look for the next in the sequence(what is it)

1) White to move, mate in 3 2) White to move, mate in 3 When referring to either puzzle, just type in ''1)'' or ''2)'' before the solution/attempt as a quick way to know which one you're talking about.

Chance Puzzle: 3 friends found a pot of gold coins. They agreed to play a game of chance. Each one toss a coin : wise kid, skillful kid, lucky kid consecutively. The wise kid schemed : if all the faces of the toss are the same then "skillful kid" lose his share but if only two faces are the same then "lucky kid" lose his share but if none of the faces are the same then "wise kid & skillful kid" lose their shares. The skillful kid agreed because he can make a toss of head or tail as he wants it after the first toss of wise kid. The lucky kid who was first to found the treasure also agreed because he just…

3 guys want 1 room. The manager charges them 30 dollars. Each guy pays 10 dollars. After a little while the manager remembers the room is only 25 dollars and sends the bell boy 5, 1dollar bills to refund the 3 guys. Since the 5 cant be split evenly between the 3, the boy only returns 3 dollars and pockets the other 2. If each guy now has only 9 dollars invested (27), and the bellboy now has 2, (29). where is the missing dollar?

Can anyone give me the result of 31 using F-I-V-E 3's ONLY Hint.... U can use any mathematical operators...

This a pretty addictive and fun puzzle game. I thought ppl might be interested in so here's the site: http://www.microgames.info/game_info.php?products_id=205 They've also got another decent game in their logic section called Parking zone whch is pretty good too. Here's the link for that: http://www.microgames.info/game_info.php?products_id=241 Have fun!

I wondered if only one else plays with prisms, I have spent many years viewing television in 3d using two prisms, It gives me new dimensions to explore, and turns a plain 2d experience into 3d, when you master this technique you can play about with one or two prisms adding in refraction to black&white areas and different effects you pick up along the way. , One of my favourite things to view or science/cosmos programmes, New dimensions jump out at you, I now find it hard/dull to view television in any other way. Also music videos, they seem to be made for this type of viewing. I often take prisms out with me, they can bring a greater depth to almost anythi…

Hi, Can anyone use five 3s to get 31 ?

1. If you are trying to climb to rafters thats are 20 feet up which is easier? A. Climb up 20 feet of rope tied off to the rafters on one end. B. Tie a rope around your waist, run the rope up 20 feet through a single pulley on the rafters and back down 20 feet and pull yourself up. 2. Using the stationary ground as a reference point. You have a track vehicle moving down the road at 15mph. The vehicle is mechanically fine and not sliding or spinning the tracks. How fast are the top and bottom of the track moving? A. Top: 15 bottom: 15. B. Top: 30 bottom: 0. C. Top: 15 Bottom: 0. …