Look at all the multiples of 9
Let your digits be x and y.
10x + y - (x + y) = 9x
Simple, eh.
Posted By: yarmyyarmy, Nov 2, 09:09:26
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- 2That's why I posted it ....
Posted By: meeky, Nov 2, 09:25:02 - and it fooled me
Posted By: Auckland Rob, Nov 2, 09:17:00
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