mohammadasad82702
mohammadasad82702
11-11-2020
Health
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Divisibility rule of 13
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littleTTTurtles
littleTTTurtles
11-11-2020
Add for times the last digit to the remaining leading truncated number. If the result is divisible by 13, then so was the first number. Apply this rule over and over again as necessary.
Explication: I did this last year, hope this helps! :)
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