Olympiad Mathematics Rules to Check the Divisibility of Numbers By Admin on Monday, November 2, 2020 A number divided by zero is undefined. Every number is divisible by 1. A number is divisible by 2 if the unit digit has either 0 or 2 or 4 or 6 or 8. Any number is divisible by 3 if the sum of digits will be divisible by 3. You can say a number …