Difference between revisions of "Divisibility rules/Rule for 19 proof"
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If <math>k=d_110^0+d_210^1+d_310^2+...</math>, we can say that <math>k+2d_0\equiv 20k+2d_0\equiv 10k+d_0</math>, which is our original number. | If <math>k=d_110^0+d_210^1+d_310^2+...</math>, we can say that <math>k+2d_0\equiv 20k+2d_0\equiv 10k+d_0</math>, which is our original number. | ||
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| + | [[Divisibility rules | Back to Divisibility Rules]] | ||
Revision as of 13:19, 22 August 2006
If 
, we can say that 
, which is our original number.
