divisible rules for 3 .6 .9

Divisibility Rules

A number is divisible by 6 if the digits in the number add to multiple of 3 and
original number was even

E.G. 24612 adds to 2+4+6+1+2=fifteen

A number is divisible by 9 if the digits add up to multiple of 9   

E.g. 125325 adds to

1+2+5+3+2+5

=18  so it is a multiple of nine and can be divided by 9

A number is divisible by 3 if the digits in the number add
to a multiple of 3.  

E.g. 231 = 2+3+1=6 and six is a multiple of 3