Jerome swapped the digits of a two-digit natural number, and the new number he got was 30 less than the original number. What could the original number have been
Jerome swapped the digits of a two-digit natural number, and the new number he got was 30 less than the original number. What could the original number have been
If you swap the digits the difference between the new and old number must be a multiple of 9. Hence it can't be 30, so there is no solution to the problem as stated.
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