Divisibility Rule
•2 even number (ends in 0,2,4,6,8)
•3 the sum of its digits is divisible by 3
•4 the last two digits form a number divisible by 4
•5 the ones ( last digit ) is a 0 or 5
•6 must be divisible by 2 and 3 (both)
•9 the sum of its digits is divisible by 9
•10 the last digit must be 0