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.

Question

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.

bobpursley · Accepted Answer

What is 28x157? http://www.worldofnumbers.com/ninedig1.htm

taylor2008 · Answer

thanks mr pursley!

jen · Answer

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