But since 6 meets all three tests (6 is even and divisible by 3 and 6), it’s a safe multiple for you to use on any of the point numbers. There’s no rule that things should be in $6 increments. Odds on the 6/8 should be divisible by 6. Odds on the 5/9 should be divisible by 3. To make sure you get full payment on your dark side odds: Odds on the 4/10 should be even.