math - 8th grade

use the numbers one to nine, each one only once. now multiply a two digit number by a three digit number and get a four digit answer using each of the digits, 1-9 each only once.

12 x 345 = 6789 of course that isn't a true statement though.

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  1. What is 28x157?

    http://www.worldofnumbers.com/ninedig1.htm

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    bobpursley
  2. thanks mr pursley!

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  3. I am curious to know how does one figure this out?
    Is there any formula? or just by trial-error method?

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