Circle Puzzle

circle_puzzle.jpg (13 KB)

To dieA, :*
“Can you figure out the radius of the circle?
(…) please do NOT post your answers, but do feel free to say if you have solved the puzzles and how long it took.”
From:
richardwiseman.wordpress.com/
Via Astropixie:
amandabauer.blogspot.com/2010/10/circle-puzzle.html
Atk


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    natedog
    Member

    solved it in 2 minutes

    Lamb
    Member

    Dude… this is 5th grade math…

    The Matrix: Rebooted
    Member

    Instantly.

    nyoki
    Member

    If there is anyone who is in high school or older that didn’t get this then my profession has some ‘splaining to do.

    nyoki
    Member

    Though it might have been more obvious if the hypotenuse had been going left-bottom to top-right. Maybe.

    WistfulD
    Member

    That’s not fair. It is a “trick question.” It is deliberately trying to get your brain to look at it and use triangle hypotenuse or circle radius math functions and not think about what you know about rectangles.

    Awesome1
    Member

    8

    djethex
    Member

    7 minutes.

    djethex
    Member

    The green line is not 3″. It’s 2.34.

    DaCheetah
    Member

    Assuming the diagram is not fully to scale, that 3″ part can be any size from 0 to 8 inches. 3″ is perfectly possible.

    djethex
    Member

    No dude, 45-45-90 triangle has specific proportions.

    DaCheetah
    Member

    I facepalmed so hard when I worked out the easy way to solve that…

    Alias
    Member
    Alias

    1.5 minutes of staring at the picture and running calculations in my mind, when suddenly I was like “wait… oh shi…”
    Nice puzzle =)

    Korinthian
    Member

    I solved it in one second.

    I won’t tell you how many quotation marks long the radius is, though.

    davids125
    Member

    Stared at it for about 2 min, sometimes it takes a while to see the little things.

    rebelyell2006
    Member

    Let me guess, is the radius 7 inches?

    casemods UID# 667
    Member

    11

    casemods UID# 667
    Member

    oops I forgot to not say the answer

    numb7rs
    Member

    This took far too long for me to see how simple it was.

    Also, how often do americans do maths with imperial measurements? It must get a bit awkward sometimes.

    AgZed
    Member

    I’m not sure how long it took me, really. I kinda skimmed past the actual question and thought I was supposed to find the measurements of the other 2 sides of the triangle. Which I did, but I needed to determine the radius of the circle, which was the answer to the fucking question, and I don’t remember when I figured that out. I really shouldn’t try to do this shit while drunk. Well, not drunk, exactly, but definitely buzzed.

    del
    Member

    I’d say about 3 seconds of morning-head processing time. The reason I knew the answer was much cooler than the answer itself though. It was from a science museum I went to as a kid which had a circular pool table with just one hole in the centre. Cunning. 😉

    bstaples
    Member

    Alright, i’m just gonna man up and be honest and say “I don’t get it”.

    Why are some people acting like the answer is purely mathmatical while others are like “when you see it, you’ll shit bricks”?

    limpgod
    Member

    …it’s both. all you need is basic math, but until you use some imagination (try symmetry) you’ll have a hard time; hence the brickshitting factor =)

    WistfulD
    Member

    The trick is that it is set up such that you look at the triangles and the circle and your brain tries to make you solve the problem that way. The answer, however, is solvable in 0.1 seconds if you instead shift your brain to think about what you know about rectangles. If you crank on it for a while working on triangle math and suddenly realize the rectangle solution, it’s kind of a facepalm moment.

    dieAntagonista
    Member

    Aw. Circles make me happy, thanks Atk. I didn’t have the number right away because I wasn’t sure what the quotation marks indicated. Damn inches, metric system for the win.
    I was also surprised by the right angle signs, is that what you use in America to mark a right angle, a little square? We use a little curve.
    My old headmistress used to slam a ruler on our fingers if we got this wrong. Lovely woman.

    Sticky
    Member

    Hah. If a teacher tried that here there’d be a major lawsuit for abuse against students. 😛

    dieAntagonista
    Member

    Ah yes, “civilisation.” Although I should say it didn’t really hurt, but everyone was afraid of it anyway so it was mental terror.

    Lamb
    Member

    In Romania both are accepted.

    dieAntagonista
    Member

    Yeah I looked it up, it seems only German speaking countries do the curve. In Romania you’re more exposed to English than German, even though German is the most widely spoken language in Europe. I don’t like all these little differences, it makes feel insecure since globally English is more important.

    Lamb
    Member

    I’m the one in a 2nd world country… Stop feeling insecure about speaking the devil’s language.

    dieAntagonista
    Member

    Si eu as fi vrut sa stau in romania. Fuck you. And I don’t feel insecure about speaking it, only mathematical differences bother me for obvious reasons.

    Lamb
    Member

    Mai poti sa te muti daca vrei. Hug you, too. Not that obvious, but I get it.

    dieAntagonista
    Member

    Nu e asa de usor sa te adaptezi alt undeva. You know me, so it is obvious. Monkeybutt.

    Lamb
    Member

    Plus despartirea de prieteni si lipsa unei modalitati bune de facut bani. *raises his finger and opes his mouth* *accepts defeat* Kittytooshie.

    Sticky
    Member

    Aw. I was expecting some very ungentlemanly and lady like behaviors, like biting thumbs.

    numb7rs
    Member

    Entertaining as this conversation is, how many more replys until we break MCS?

    Reaver
    Member

    Psych Major reporting in.

    Dreth
    Member

    I can totally see myself using this in the world of employment.

    Pants
    Member

    international baccalaureate graduate ready and accounted for

    RepairmanJackX
    Member

    oh, I see it. Derp.

    storminmormon
    Member

    College has me doin such high levels of math that simple problems like this frustrate the shit out of me. I know I know how to solve this but I am so used to going through three sheets of paper to solve a problem that using simple math just seems wrong. :S

    Puulaahi
    Member

    I got it, but fuck I hate math. Math is proof that hell exists.

    Babazon
    Member

    After spending 10 minutes with a, b and r, I wanted to use the diagonal and BAM!.. 😀

    Those who still can’t get it. Check out the other diagonal of that rectangle, what is it?

    sleepyjoe256
    Member
    sleepyjoe256

    Good God I’m glad I’m a music major. This shit makes my head hurt.



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