It just eliminates the multiples of 2 and 3 6x ± 0: divisible by 2,3 6x ± 1: not divisible by 2,3 6x ± 2: divisible by 2 6x ± 3: divisible by 3 6x ± 4: div

It just eliminates the multiples of 2 and 3 6x ± 0: divisible by 2,3 6x ± 1: not divisible by 2,3 6x ± 2: divisible by 2 6x ± 3: divisible by 3 6x ± 4: divisible by 2 6x ± 5: modulus equivalent to 6x ± 1