
Arundeep

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. 