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Vedic Math / Quicker Math / Math Tricks : 
DIVISIBILITY BY EIGHTEEN : Rule: Any number which is divisible by 9 and has its last digit (unitdigit) even (or zero), is divisible by 18.Ex. 1. 926568 : Digitsum is multiple of nine (je, divisible by 9) and unitdigit (8) is even, hence the number is divisible by 18. Ex. 2. 273690 : Digitsum is multiple of nine and the number ends in zero, so the number is divisible by 18. Note: During the calculation of digitsum, follow the method of "forget nine". If you get zero at the end of your calculation, it means the digitsum is divisible by 9. Share new methods & leave your comments below... Click here to top 