1	Two (2)	If a number has the last digit on the right hand side as 0, 2, 4, 6 or 8, the whole number is divisible by 2.
2	Three (3)	If the sum of the digits of a number is divisible by 3, the whole number is divisible by 3.
3	Four (4)	If the last two digits on the right hand side of a number are divisible by 4, the whole number is divisible by 4.
4	Five (5)	If the last digit on the right hand side of a number is 5 or 0 then the number is divisible by 5.
5	Six (6)	If a number is even and also divisible by 3 then the number is divisible by 6.
6	Eight (8)	If the last three digits on the right hand side of a number are divisible by 8 then the whole number is divisible by 8.
7	Nine (9)	If the sum of the digits of a number is divisible by 9 then the whole number is divisible by 9.
8	Ten (10)	If a number ends with 0 the number is divisible by 10.
9	Eleven (11)	If the sums of the alternate digits of a number are equal, the number is divisible by 11.
10	Twelve (12)	If a number is divisible by 4 as well as 3 the number is divisible by 12.
11	Fifteen (15)	If a number is divisible by 3 as well as 5 the number is divisible by 15.
12	Eighteen (18)	An even number divisible by 9 is also divisible by 18.
13	Twenty-five (25)	If a number ends with 25, 50, 75 or 00 the number is divisible by 25.
14	Thirty-three (33)	If a number is divisible by 3 as well as 11, it is divisible by 33.