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101010 – Fun With Numbers

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I love numbers.  I was thinking about numbers and dates on my run yesterday.  Here’s a few fun ones for you.

101010 – On 10/10/2010 the answer the life, the universe, and everything will be revealed.

030309 – Isn’t it fun to have square root day be “prime square root day”?  How many of them are there in the 21st century?  How about 02/02/04, 03/03/09, 05/05/25, 07/07/49.  That would be five.  So there are a prime number of prime square root days.

090909 – Number 9, Number 9, Number 9 is the day that the Beatles version of Rock Band is released.  As a special bonus it’s the second day of my Q3 off the grid vacation.

Got any other good ones for me?

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March 8th, 2009     Categories: Numbers    
  • http://ivyfrog.com Peter

    Here's a fun number: By 2010 we'll be lending $6 billion to entrepreneurs in other countries, and investing $5.8 billion into start-ups in the United States.

    We'll be giving more to other countries than our own start-ups.

    Fascinating.

    Source: http://scottdig.com/wp-content/uploads/2009/03/to…

  • http://intensedebate.com/people/steve_bergs2127 Steve Bergstein

    101010=42, very insightful.

    Maybe you should become a Talmudic numerogist.

  • http://www.mltda.com Dave Levy

    Nov. 11th, 2011. How can you not love a beautiful and perfect palindrome in 11/11/11?

    Sure, 9/9/09 is cool, but not nearly as perfect.

    • http://intensedebate.com/people/bfeld bfeld

      Yes – 111111 is a very nice one.  Plus it has five prime factors (3*7*11*13*37).  Unfortunately when converted to base 10 it’s not prime.  Almost but not quite ideal.

      • http://toostep.com/profile/rohit_khanna Khanna

        I love to do data anlysis…111111=63(6+3=9) so 09-09-09 is a good numer

  • http://intensedebate.com/people/karlfox karlfox

    I had to double check that I had returned to the right blog. lol.

  • James Barry

    Slightly off topic… but still a great number trick:
    Take the number three.
    3 divided by 2 = 1.5
    1+5=6
    6 is evenly divided by 3.

    3 divided by 4 = .75
    7+5=12
    12 is evenly divided by 3 AND 1+2 = 3
    It works all the down and all the way up.

  • http://intensedebate.com/people/fnazeeri Furqan Nazeeri

    Have you read this book, Born on a Blue Day by Daniel Tammet, the autistic savant who recited Pi to 20K digits or so? If you like numbers, you'll love this book.

    • http://intensedebate.com/people/bfeld bfeld

      Thanks for the recommendation – it’s on my Kindle.

  • http://intensedebate.com/people/vikasiamoto Vikas Reddy

    1729. The smallest number expressible as the sum of two cubes in two different ways.

    One of my favorite little anecdotes involves the Cambridge mathematician G. H. Hardy and the Indian mathematician Srinivasa Ramanujan:
    "Hardy used to visit him, as he lay dying in hospital at Putney. It was on one of those visits that there happened the incident of the taxicab number. Hardy had gone out to Putney by taxi, as usual his chosen method of conveyance. He went into the room where Ramanujan was lying. Hardy, always inept about introducing a conversation, said, probably without a greeting, and certainly as his first remark: ‘I thought the number of my taxicab was 1729. It seemed to me rather a dull number.’ To which Ramanujan replied: ‘No, Hardy! No, Hardy! It is a very interesting number. It is the smallest number expressible as the sum of two cubes in two different ways."
    http://www.durangobill.com/Ramanujan.html

    I think this story is in the book Archimede's Revenge, which is a really fascinating collection of mathematical tales:
    http://www.amazon.com/Archimedes-Revenge-Joys-Per…

  • http://intensedebate.com/people/bfeld Brad Feld

    As with most forecasts, this one has the potential to be really wrong given the hockey stick in 2009 and 2010 associated with microlending.  That said, it’s definitely a provocative statement!

  • http://WhoHasTimeForThis.com David Cowan

    I hope to be celebrating my 79th birthday on 012345

    • http://intensedebate.com/people/bfeld bfeld

      And I hope to be there!  I’ll bring a box of numbers instead of a cake.

  • Tom Anderson

    Don't forget pi day (3/14)! It's also Einstein's birthday… eat some pie to celebrate.

  • http://intensedebate.com/people/tonyknuckles tonyknuckles

    The actual Pi day yesterday is the one that threw me for a loop.

  • bridgett

    Well I will be 36 on 101010. funny thing is since i can remember i have seen 1010 everyday, meaning I look at the clock at 1010 or my bank has a branch with the address 1010(this was not on purpose). I use verison wireless and when i looked online for a new phone all of there examples display 1010 as the time. a friend of mine visited recently her flight was delayed and actually flew out at 1010. my moms birthday is 0202 and her moms is 0505. just one of those things I guess

    • Tric

      I too am 1010 and have always noticed clocks or timing when looking at a clock. All of my friends remember 10:10/ There's got to be a universal time code that clicks at 10:10. ON 10.10.10 I will be 52. I have waited a long time. I am thinking SOMETHING should happen. Its interesting your mom is 0202 and your grandmother 0505. My twist is I was a twin. The other never made it and it was found inside me and surgically removed. The 1010 in me is more about mirrors.

    • amelia

      Twenty five years ago, my nephew was born on 10/10, at 10:10 p.m., and weighed 10 lbs. and 10 oz, and he had 10 fingers and 10 toes. Turns out he's also a math genius, rock star, extreme sports pro and a great guy!

  • http://www.savethislink.net social bookmarking

    12212012 : December 21st, 2012 DOOMSDAY. Is it the right place for it? ;)

  • megancydell.

    i was born on 10/10/94.
    im turning 16 on 10/10/10.
    my middle name is the name of my aunt who died when she was 10 by a drunk driver. (16… driving…)
    and if she was still alive my grandpa and grandma would have had 10 kids in all.

    but i think thats soo cool how it all pulls together. (:
    oh and ive always been against alcohol all my life and ive always been scared of driving… freaky!

    maybe im like her reincardation or whatever. ha.

    • megancydell.

      oh also my dad says my aunt cydell always loved gymnastics and so do i. (:(:

  • http://www.cliffsidemalibu.com/drug-rehab Rehab

    Well I guess 101010 should also be included – 10/10/2010 – this would happen only once in a lifetime.
    Rehab

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  • april

    10/10/10 is my 21st birthday. its going to be a good day.

  • andrea

    in the 10 10 10 i'll turn to 33. my lucky number is 7, if you add 10 10 10 to 33 and 7 (sunday) the result is 70, take the 0 off. we have 7. if you add the letters of my family and first name the result is 7. something are going to happen? funny!

  • Cindy

    My son is turning 30 on 10-10-10….

  • meglynn

    when will the next 10-10-10 be? how many years will it be until the next one??

Brad Feld

Hi, I'm Brad Feld, a managing director at Foundry Group who lives in Boulder, Colorado. I invest in software and Internet companies around the US, run marathons and read a lot.

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