1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Easy big square w/0 calculator

  1. Oct 19, 2005 #1
    take any number, for example X and try and square it...

    first let Y = X rounded up the nearest power, not multiple, of 10

    [ X - (Y - X) ] * Y + (Y - X)^2 = X^2

    it should work every time...

    let X = 998

    [ 998 - (1000 - 998) ] * 1000 + (1000 - 998)^2

    [ 998 - 2 ] * 1000 + 2^2

    996 * 1000 + 4

    996000 + 4

    996004

    998^2 = 996004

    you can do it for any number and it should work...

    like 9999999999999999999999999999^2 is equal to 99999999999999999999999999980000000000000000000000000001
     
  2. jcsd
  3. Oct 19, 2005 #2

    HallsofIvy

    User Avatar
    Staff Emeritus
    Science Advisor

    Yes, that's pretty trivial and pretty well known.
     
  4. Oct 22, 2005 #3
    Yea I figured that out out of boredem in math last year... Its neat but not practical.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Easy big square w/0 calculator
Loading...