Jan 172009

Change From 9999 9999 to 2009 in a Mathematical Way (Math Puzzle)

Math Puzzles Add comments

I’ve tried to relate a number of 9′s to some meaningful number, such as the number of this year, 2009. I intend to let people appreciate the very simple tool of mathematics, which can show their myriad of changes of use. This problem is only a vehicle to give people the taste of the skill of higher order thinking, while solving Math problems.

Duration : 0:3:18


Technorati Tags: , , , , , , , , , , , , , ,

Readers have also enjoyed these related posts:

  1. Best New Generation Mechanical Puzzle: Icosedron (Crystal Version), Not Rubik
  2. Should Kids Learn Math or Just Get a Calculator?
  3. 22 Math Puzzle Mini-Books
  4. Re: 2718 2818 to 2009
Posted by admin Tagged with: Algebra, alphametics, arithmetic, backwards, crytarithm, Mathematical, mathematics, problem, puzzle, rehcaethtam, Shuxue, shuxueyouxi, solving, strategies, working

5 Comments to “Change From 9999 9999 to 2009 in a Mathematical Way (Math Puzzle)”

  1. Dth2xoochy says:
    January 17, 2009 at 2:44 pm

    Let Log2(9) bea log …
    Let Log2(9) bea log with base equal to:
    sqt(sqt(9))

    Log2(9)= 4 as in the video

  2. Dth2xoochy says:
    January 17, 2009 at 2:44 pm

    I can do this with …
    I can do this with six 9′s.

    Let Log11(9) be a log with base equal to:
    sqt(sqt(sqt(sqt(sqt(sqt(sqt(sqt(sqt(sqt(sqt(9))))))))))))

    Thus Log11(9) = 2048

  3. rehcaethtam says:
    January 17, 2009 at 2:44 pm

    Thanks for your …
    Thanks for your kind attention!

  4. MrfixitRick says:
    January 17, 2009 at 2:44 pm

    Whoops, I meant …
    Whoops, I meant 999+999 = 2009 – 21 !!

  5. MrfixitRick says:
    January 17, 2009 at 2:44 pm

    Thanks for the …
    Thanks for the video challenge!

    I offer: 999+999 = 2009 – 20

    Only 6 nines used, and the number 2009 is still unique!
    (Hehe, I think I may have cheated…;)

    Cheers, Rick

Leave a Reply

(required)

(required)