Math Student Help

If you take an ordered number such as (98, 43, 345, 456, 987, 4,321…) and subtract it from another ordered number in the same order (the digits ranging from least to greatest or greatest to least) you get a multiple of a number where its digits are repeated.
For example:
543-321=222
98-32=66
765-321=444
If you reverse the order of the digits you will get the same answer.
For example:
345-123=222
89-23=77
567-123=444
Note that it varies if the number contains a zero.

<waiting for the other shoe to drop…

This entry was posted on Sunday, August 30th, 2009 at 12:08 am and is filed under subtraction. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.