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Homework Help: Factoring 1001

  1. Oct 26, 2007 #1
    1. The problem statement, all variables and given/known data
    Is there any simple way to factor 1001=7*11*13 by hand?

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Oct 26, 2007 #2


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    Homework Helper

    Since last digit in 1001 is one it can be divided by either 1 or 3 or 7 or 9.Try one by one. You can see that 7 is a factor. Proceed in the same manner.
  4. Oct 26, 2007 #3
    How do you know that a priori? Why does it need to be less than 10?
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