Brain Teasers and Puzzles

You've just poured yourself a hot cup of coffee. Before you can do anything, something comes up which will take you about 15 minutes. You take your coffee with cream which is at room temperature. In order for your coffee to be as hot as possible when you get back when should you mix in the cream? A) now B) when you get back in 15 minutes C) it doesnt matter Logic based riddle

You run a popular weekly poker game and a late cancellation has left you with a seat to fill You ask a friend visiting from out of town if he would like to play. He has played poker but doesn't want to be out classed as a moderately skilled player, so he asks you what the average win rate is for all of the players in the game. The players have allowed you keep detailed win/loss records which you share with all of your players. The game is fed by a player pool of 50 semi-regular players they each have a wide variety of hours in the game, and buy-ins cover the range. Assume all normal distributions. And 30 hand per hour The game has run without fail for tw…

You have a coffee cup holding exactly 1 cup of coffee and a tea cup holding exactly 1 cup of tea. Using a standard sized teaspoon, you transfer one teaspoon of coffee and mix it in with the tea. You then transfer a teaspoon of that mixture back into the coffee cup. Question: A) Is there more coffee in the tea cup B) Is there more tea in the coffee cup C) Or are the amounts the same?. Justify your answer.

To test your mental acuity, answer the following questions I will give the link later! 1. Johnny’s mother had three children. The first child was named April. The second child was named May. What was the third child’s name? 2. A clerk at a butcher shop stands five feet ten inches tall and wears size 13 sneakers. What does he weigh? 3. Before Mt. Everest was discovered, what was the highest mountain in the world? 4. How much dirt is there in a hole that measures two feet by three feet by four feet? 5. What word in the English language is always spelled incorrectly? 6. Billie was born on December 28th, yet her birthday always falls in the summer.…

Does anyone tell scientific facts about games for brain? In other words, I play games for brain and try to train, I believe that they help to progressing cognitive processes. Thanks in advance.

It has definitely been a weekend for solving problems that I've been working on for a few years, and this challenge is about a discovery that I made today involving interpolation and iterated exponentials or nested exponentials as I like to call them. Some of you are aware of my thread, Discoveries by Daedalus, where I prove various relationships for iterated exponentials and the nested logarithm operation that I discovered. Ever since the work I did on nested exponentials, I've been trying to find a nested / iterated exponential interpolation formula, and today I have discovered exactly that. The discovery occurred to me after making a few posts in the thread, Find…

Does anybody know about The Positive and Negative Effects of Video Games ? Is playing video games good or bad for you? In other words, I know about a negative effects but i don`t know about positive effects. Thanks in advance )

For this challenge, I've decided to go with the radial engines. The challenge is to solve for a single vector valued function in two dimensions that describes the paths of the pistons for a radial engine with [math]n[/math] pistons, rod lengths [math]L[/math], a hub radius [math]r[/math], and a crank radius [math]R[/math] as seen in the following image: All of other rods connect to the master rod, which connects to the crank. The mathematics for the path of the piston connected to the master rod is no different than a standard crank system. However, because all the other pistons are connected to rods that are attached to the master rod, the other piston …

If: And "the" is 746 And "who" is 340 And "Is" is 12 And "wrIter" is 35175 Who is the writer? Hint:my username If: "the" is 746 And "who" is 340 And "Is" is 12 And "wrIter" is 35175 "Who is the writer"?

There are 15 Sticks laid out as per the following diagram : This game is played between two Players. Each Player picks some sticks on his/her turn and he/she must pick up at least one stick on his/her turn. Whichever Player picks the LAST STICK loses the game. That means the Aim of the Game is to force the Opponent to pick the Last Stick. A Player can pick up any number of sticks from any ONE ROW at a Turn. That means if I start the game I can pick up either 1 stick from Row 1 OR 1 , 2 or 3 sticks from Row 2 OR 1,2,3,4 or 5 sticks from Row 3 OR 1,2,3,4,5,6 or 7 sticks from Row 4 on the first turn. My opponent can similarly pick up any number o…

I was sent this brainteaser by a friend. Is she messing with my mind or can anyone here solve it. lindafirsthenry heart gee male don't come

A long time ago, I discovered how to modify a function in such a way as to only affect a single output for a given input. The function's domain is restricted to the set of integers. The following is an example of what I am describing: [math]f \colon \mathbb{Z} \rightarrow \mathbb{R}[/math] defined by [math]f(x)=x^2[/math] Without affecting any other output of [math]f(x)=x^2[/math], can you figure out how to modify the function such that [math]f(3)=\pi[/math] ? The modified equation must still produce all other outputs of [math]f(x)[/math] and only change the output of [math]f(3)[/math] such that it would produce the following sequence (ignoring negatives in the ex…

Some types of compressed files can be compressed further, losslessly... http://www.fastcompany.com/3050180/tech-forecast/these-engineers-just-built-their-own-pied-piper-compression-algorithm yet it is known that there is no possible algorithm that can losslessly compress all possible input data. This puzzle's about that. ---- There is a type of data stream that is a fixed length N bits of binary data. The data is statistically random; every possible variation of 0s and 1s is as likely as any other. There is an optimal lossless compression algorithm that reduces the data size of as many of the possible data variations as is mathematically possible, and produces…

Light up the 27 bulbs on the ceilings of the building by installing 54 pipes having single wiring inside.

One of the 12 identical coins was magnetized so that it weighs (Z or Y) heavier on one face and lighter on the other face when place on a certain weighing scale. But it weighs X like the other normal coins when it is standing balanced on its side or edge. Using the weighing scale just 3 times ..find that odd coin and determine its heavy or light face.

One of the 39 identical coins was magnetized so that it weighs ( Y or Z ) heavier on one face and lighter on the other face when placed on a certain weighing scale. But it weighs X like the other normal coins when it is standing balanced on its side or edge. Using the weighing scale just 4 times [means 4 weighings / judgments only].find that odd coin and determine its heavy or light face. Please note only a digital weighing scale is to be used and each of the 38 normal coins weigh identically 1 Gram [X] while the magnetized coin weighs Y Grams [ Y > 1 Gram ] on one face and Z Grams [ Z < 1 Gram ] if face.down.

I've seen a lot of people try to stump the clever bot or prove its a bot or a person, but a lot of people surprising can't do it, but I guess by chance on my first try I managed to do it, the conversation was Me: Hello? bot: How was your day today? me: first I have a question. bot: what is the question? me: are you conscious? bot: yes. are you? me: how do you know? bot: to know is to exist me: how so? bot: cook. me: that doesn't answer the question bot: yes. me: that doesn't answer the question. I didn't think it would be that easy. bot: whatever - how was your day? If you have a way to do it, go ahead, it's just kind of important (but not really) i…

I did not manage to figure this one out. Can you?

A time traveler travels exactly 3 seconds to into the past from where he was standing, however when he arrives in the past and waits 3 seconds, he sees himself, but he does not see himself traveling into the future. How is this possible?

THE more intrigued you are the more chance I will invite you to help me wih production I give codes to participants if no one cracks the Code clues are given G.O.D. first clue all valueABLE and pressure

Hello. I'm new here. I was just wondering if anybody would like to attempt to crack 'The Carousel'? It's a fusion of rap and science and poetry and steganography. I don't live in a basement with blacked-out windows, honest.

http://meecles.net/puzzles/challenges.html ^ I stumbled upon this really well puzzel that deals with hard things! I know the answer is 80 numbers long. If you figure it out leave the answer in the comments! If you get it you are super smart andddd Ill give u a cookie!