take twice the last digit from the rest. so if i had 357, 7 is the last digit, so 7*2 = 14. so weve taken the last digit and doubled it (35. 7. the rest is 35 ( 35. 7) now we have
http://wiki.answers.com/Q/What_is_the_divisible_ru...

Take the last digit in a number. Double and subtract the last digit...
http://www.chacha.com/question/whatisthedivisib...

1. The easiest rule is for 1: every number is divisible by 1! The only rule to check if 1 divides evenly into any number, is just to check if you actually have a number! 2. Numbers
http://www.ehow.com/how_4901143_applydivisibility...

To find out, if a number is divisible by 7, take the last digit, double it, and subtract it from the rest of the number. If you get an answer divisible by 7 (including zero), then
http://answers.yahoo.com/question/index?qid=200909...
