First, the true odds for the 4 and 10 are the same, as are the odds for the 5 and 9 and the 6 and 8. It's that easy. For example, if you want to know what the true odds are for the 4 and 10, just subtract one from 4 and you get 3. So the true odds for the 4 and 10 are 6 to 3, or rounded 2 to 1. To get the true odds for the 6 and 8, subtract one from 6 to get 5, or true odds of 6 to 5.
All casinos allow players to wager single odds.
This means you are allowed to make an odds wager equal to the pass line bet. Most casinos will also take double odds. This means the player can make an odds bet equal to twice the amount wagered on the pass line. Wager three units on the pass line. If the point is 4 and 10, wager three units as odds.