Question: If the error is divisible by 9, it is very likely that the mistake was made by a transposition of figures as, 345 posted 453
If the error is divisible by 9, it is very likely that the mistake was made by a transposition of figures as, 345 posted 453 makes an error of 108, which is divisible by 9, again 753 posted 735 makes an error of 18, also divisible by 9.
Errors of transposition are the most difficult to find.
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