The 10 basic and easy divisibility rules to remember: Rule 1:All numbers are evenly divisible by the number “1”.  For example, the number 78 when divided by “1” equals “78”. Rule 2: If a number ends with a 0, 2, 4, 6 or 8 then that number, no matter how long it is, will be evenly divisible by the number “2”.   Rule 3:If the combined sum of the number is divisible by the number 3, then the entire number is evenly divisible by the number “3”.   Rule 4:If the last two digits of a number are divisible by the number “4” then the entire number is evenly divisible by the number “4”.   Rule 5:If... Show more

The 10 basic and easy divisibility rules to remember:

Rule 1:All numbers are evenly divisible by the number “1”.  For example, the number 78 when divided by “1” equals “78”.

Rule 2: If a number ends with a 0, 2, 4, 6 or 8 then that number, no matter how long it is, will be evenly divisible by the number “2”.  

Rule 3:If the combined sum of the number is divisible by the number 3, then the entire number is evenly divisible by the number “3”.  

Rule 4:If the last two digits of a number are divisible by the number “4” then the entire number is evenly divisible by the number “4”.  

Rule 5:If the last digit of a number is either a 0 or a 5, then the entire number is evenly divisible by the number “5”.  "

Rule 6:If the last digit of a number is divisible by the number “2” and the sum of all the numbers is divisible by the number “3” then the entire number can be evenly divisible by the number “6”.  

Rule 7: If the sum of all of the digits is evenly divisible by the number “9” then the entire number is evenly divisible by the number “9”.  

Rule 8:If the last digit of a number is “0” then the entire number is evenly divisible by the number “10”.  

Rule 9: If you have a number such as 4191 and, moving left to right, you subtract every second number from its preceding number and then you add the remaining numbers, if their sum is divisible by the number “11”, then the entire number is evenly divisible by the number “11”.  

Rule 10:If the number is evenly divisible by both the numbers “3” and “4” (see Rules 3 and 4 to work this out), then the entire number will be evenly divisible by the number “12”.  

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