Wednesday, February 25, 2009

Prime Factors of 8051

Find the prime factors of 8051 withouts using any computing devices. Do not even use paper and pen. It's pretty simple, actually, once you see it. :) Put the answer in the comments.

5 comments:

  1. Gahh ... I tried all the primes upto 23 mentally before giving up ... and going Mathematica. How were you supposed to see it? Oh and as if I wasn't running behind on my work already, thank you very much for nerd sniping me. ;)

    ReplyDelete
  2. 8051 = 8100 - 49

    Took me about 10 seconds to figure it out :)

    ReplyDelete
  3. @ The Rat -- Duh!!

    @Shanth -- Vamsi has it right. Lengthier solution below. LOL on nerd sniping! :D

    @Vamsi -- Right on!

    8051 = 8100 - 49
    = 90^2 - 7^2
    = (90 + 7) * (90 - 7)
    = 97 * 83

    ReplyDelete