Math Magic



The above video is just amazing. Dr. Arthur Benjamin performs feats of math in his head and even tries to explain some of the methods he uses to arrive at the answers. Just watch it. I guarantee you will be as amazed as I was.

Via Ted

    • Anonymous
    • December 17th, 2007

    If you’re in LA this week, Dr. Benjamin is performing in the early round of shows at the Magic Castle, until December 23rd!

    • Alexander
    • December 17th, 2007

    I’d always thought there would be no money in Maths…

  1. that’s amazing … I wish he would visit egypt one day, would certainly go check him out.

  2. OMG HE’s amazing!

    • JIm
    • December 18th, 2007

    I love it!

    • SadPanda
    • December 19th, 2007

    that nerd ought to be shot

    • Jana
    • December 19th, 2007

    OH – MY – GAWD!

    • Shandooga
    • December 19th, 2007

    what an arrogant little man. Interesting skill but how does it improve the world? Are we all better off? Are any of us better off?

    • rob
    • December 19th, 2007

    Of course we are better off, he not only awes people but makes them laugh. What better than making people enjoy math, something that most people would never find enjoyable. There are countless ways an increased joy in math could have a profound impact on the world. For the simplest example, what if a parent saw his show and was so impressed that his or her kids should try harder in school so that they can be good at math too. Before you count someone off consider even the simplest ramifications of any one person’s effects on the world.

    • Blah
    • December 19th, 2007

    Arrogant? He’s entertaining people, it makes people laugh.

    • Jake
    • December 19th, 2007

    Shandooga needs to shut the hell up.

    Someone found a passion of theirs and pursued it. They mastered their area and you have the GALL to say that they’re wasting their time because YOUR no better for it.

    Sit down, shut up and understand that you’ll NEVER accomplish anything half as amazing as what Dr. Benjamin has done already.

    • Mdless_Twit
    • December 19th, 2007

    Uhmmm, I guess I’m just not sophisticated enough. I thought the whole idea here was to be entertaining, unique and ‘magical’.
    Nutty me, I never even considered that every act man undertakes must have some profound meaning and significant impact on our world. Sounds like a heavy responsibility.
    I’m glad I live in my world and not Shandooga’s, although his post has cleared-up the definition of arrogant for me.

    • theDude
    • December 19th, 2007

    it’s……you’re…oh and nice rant.

  3. That guy should try to get a job at NASA or something. Or be a teacher, ;)

    • Zero-kill
    • December 19th, 2007

    Well I’m sure that he would rather be a teacher than work for the government by any means. Those who hate upon the genius that it takes to formulate the numbers like the doctor there, should really take themselves into hand and figure out what their problems are.

  4. Lol^^^^

    Become a teacher but don’t work for the government

  5. Shandooga, what have YOU done to improve the world? What’s that? Oh yeah, NOTHING…

    • Harry
    • December 19th, 2007

    Arthur Benjamin is a professor at Harvey Mudd University, a technical college in California, I saw him at an MAA conference where he performed a similar act.

    • heaven
    • December 20th, 2007

    He is evil and worships numbers, god is against numerology. Be careful of people who worship numbers.

  6. I just loved it.Its just amazing thanx for it

    jasmine
    tech-chek.blogspot.com

    • Andyfox
    • December 20th, 2007

    Seriously……I hope that you are joking, why would God in any way hate numerology, if you believe in God, then you have to believe that God has given man our abilities, and so you must then naturally conclude that he would be proud of this man’s profound use of said abilities.
    Enough of my ranting, religious bigots piss me off.
    None the less, fantastic show, brilliant ability, and….cookie ^_^

    • Alex
    • December 20th, 2007

    Excellent.

    • NeoXon
    • December 20th, 2007

    He used this method. Anyone can learn it if he is ambitious enough and has free-time.

    Day of week: http://memorymentor.com/what_day.htm

    As for the math calculations: he used GMS system. He converted numbers to common ideas (nouns). You could hear he was talking about fish and cookie, and stuffs like that.

    Read more here: http://memorymentor.com/gms.htm

    Anyways its a nice show. At least people will see that we are capable of many more things besides sitting in front of TV.

    • John Henry
    • December 20th, 2007
    • Math student
    • December 21st, 2007

    I saw this guy in person once at a conference in Mississippi. He’s very impressive. I can’t say I’m terribly amazed by his calculation of the day of the week (I’ve been doing that one since high school fairly easily, though he does it a bit faster). But he did square an arbitrary 5-digit number for us, along with some other impressive multiplications. He has at least one book too, but I never broke down and bought it.

    • jake3988
    • December 21st, 2007

    Very impressive. That memory mentor website, however, from a few posters back is absolutely terrible. The day of the week calculation is an extremely simple easy plug and chug formula I learned in discrete mathematics last year.

    Instead, they try and drag it out to a page long thing about mnemonics and don’t really ever arrive at the actual formula.

    • lee harvey
    • December 21st, 2007

    i agree he needs to die, we don’t need people getting smarter than they already are….

    • Wyatt
    • December 21st, 2007

    As Harry said, he’s a professor at Harvey Mudd College and was one of my favorites while there. He’s got such an amazing memory that on the first day of class he’ll go down the list and call out names briefly looking up to see their faces. When he’s done with the whole list, he looks back up and rattles off everyone’s name as he looks at them.

    Oh and he has worked for the government as well, doing some consulting for the NSA.

    • Wyatt
    • December 21st, 2007

    Oh and I also love those that would call him arrogant. If only they actually got to meet him and see how cool he was.

    • shawn
    • December 22nd, 2007

    umm i think he had some help with the last part because he messed it up. if you listen he says “77, 862 … 77, 862 that becomes cookie fission” (or something) (at 14:11) and then he says “cookie fission is 77,822 .. that seems right ill go on” yet he still gets the right answer?

    • TopSod
    • December 22nd, 2007

    Anybody else notice he’s wearing an earpiece?

    • CUrt
    • December 22nd, 2007

    Photoshopped!

    • Speedbump
    • December 22nd, 2007

    But can he balance his checkbook?

    • steve
    • December 23rd, 2007

    God doesn’t exist.

    Numbers, however, do.

    And they created the universe.

    Then there was light.

    Amen.

    • Brad
    • December 24th, 2007

    That is absolutely amazing.

    • karlo
    • December 25th, 2007

    this dude sold books under the same name “mathemagics.” i bought one of those, it was, i think late 90s or early 00s. it came with a thin book, some of his techniques with 2, 3 digit squaring, adding, division and it included “math games.” and it also came with 4 cassettes. wonder where my copy went… hmmm….

    i wonder if he has anything new?

  7. that was awesome.

    • Al
    • December 25th, 2007

    this guy is garbage
    look up Daniel Tammet on youtube…watch that and you will be AMAZED!!!

    • Tom the Projectionist
    • December 25th, 2007

    Can anyone tell me how/why I guessed 22 and 47 when he asked for the first 2 digit numbers?

    • Kcedazt
    • December 25th, 2007

    This is kinda fun, and I definitely wouldn’t dis on him or anything. However, there are actually quite a bit of academics who can do much more difficult calculations in their head. In fact, there are quite a few fourteen year olds that can.

    Still, it’s silly to dis on him.

    • calum
    • December 26th, 2007

    hey lee harvey,
    how would the human race advance if people weren’t getting smarter?

    • Rob
    • December 27th, 2007

    back in the late 90’s he sells a video “Mathemagics” that teaches math skills. it was sold around $80~90 i think.

    • matt
    • December 28th, 2007

    oh…i get it!

    AFTER every time he says “thank you very much”, the audience instantly applauds

    it’s like a jedi mind trick. quite the magician, i must say.

    • Joris
    • December 30th, 2007

    Everyone ever heard about the guy that can take the thirteenth root (am i saying it right?) of a 200 digit number in a few seconds which is a little faster than this guy.

    But it still is awesome.

    • Leroux
    • December 30th, 2007

    Big Deal

  8. Found a website that has maths stuff similar to what Art uses, it’s called Vedic Maths.

    http://www.vedic-maths-ebook.com/download.htm

    There is an ebook under part one to download at no cost.

    It’s ok, not very long though but got a few useful things from it.

    • Skeptic
    • December 31st, 2007

    Am I the only one who sees the ear piece in his ear?

    • Daryll
    • December 31st, 2007

    Hey Skeptic,

    I don’t see it there… Can you give us a time frame we can look at?

    • Javo1953
    • January 1st, 2008

    Amazing!He should be employed to save the world from impending natural disasters in any of the vulnerable are.

    • Steven
    • January 1st, 2008

    Not to be a downer, but on the 3 digit squares he got 2 answers wrong… not that I’d have done nearly as well as he did or to put him down… but: (he said) 457^2=205849. According to my calculator and my verification 457^2=208849. The second mistake was 722^2=(he said) 513,284. The correct answer is 521,284.

    Don’t want to be a downer… just saying he’s making mistakes. Don’t get him to do your taxes, stick to your calculator.

  1. January 27th, 2008
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