I thought I remembered that transposed digits results in a difference divible by 3. Of course, 9 is divisible by 3, so that test also works but may lead you to look for transposed digits when there are not. But even difference divible by 9 does not guarantee the issue is transposed digits.
Another trick is you can sum the digits of a number, and if the sum of the digits is divisible by 3, the number is divisible by 3. Harold On Mon, December 22, 2025 12:27 pm, Stan Brown (using GC 4.14) wrote: > You're quite correct, R. > > > 32 for 23 is a difference of 9, not 11. _Any_ swap of two digits will > make for a difference that's divisible by 9 (not necessarily equal to it). > > > 52 for 25 is a difference of 27, 3Ã9. It's not a coincidence that the > digits 2 and 5 are 3 apart. > > When dinosaurs ruled the earth and we kept ledgers manually, a > difference of say 630 in a trial balance told us to look for two transposed > digits in the 100s and 10s positions, with the digits 7 apart because 63 = > 9Ã7. > > > Stan Brown > Tehachapi, CA, USA > https://BrownMath.com > > > On 2025-12-22 09:52, R Losey wrote: > >> Are you sure about that? I was told swapping numbers leads to a >> difference that is divisible by 9, not 11. >> >> >> >> On Sun, Dec 21, 2025 at 3:39â¯PM Doug via gnucash-user < >> [email protected]> wrote: >> >>> There are some accounting tricks: number reversal usually gives a >>> difference divisible by 11 (not sure why!) > > > _______________________________________________ > gnucash-user mailing list [email protected] To update your > subscription preferences or to unsubscribe: > https://lists.gnucash.org/mailman/listinfo/gnucash-user > ----- > Please remember to CC this list on all your replies. > You can do this by using Reply-To-List or Reply-All. > > -- Not sent from an iPhone. _______________________________________________ gnucash-user mailing list [email protected] To update your subscription preferences or to unsubscribe: https://lists.gnucash.org/mailman/listinfo/gnucash-user ----- Please remember to CC this list on all your replies. You can do this by using Reply-To-List or Reply-All.
