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A 6digit answer (
Posted on 20131124
)
Given:
A
and
B
are 3digit numbers, such that
A*B=C
and
C
is a permutation of their digits.
Find all possible solutions.
No Solution Yet
Submitted by
Ady TZIDON
No Rating
Comments: (
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)
Casting out 9s
Comment 2 of 2 
Mod 9, we must have A*B = A + B
The only mod 9 values that work are
A B
 
0 0
2 2
3 6
6 3
5 8
8 5
This cuts the number of possibilities down by almost 93%, but this still seems to be a job for a computer
Edited on
November 24, 2013, 4:10 pm
Posted by
Steve Herman
on 20131124 13:37:50
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