Law of the third (LoTT) states that on average one third of roulette numbers will not appear in 37 spins (single zero wheel). This is a statistical fact that governs the way many system are designed and played.

Now, keeping to the single zero roulette wheel and breaking the numbers down into finals, will the LoTT still apply to the ten groups of numbers? Will using ten groups of numbers require ten spins to determine the LoTT?

How will the fact that the groups do not have an equal amount of numbers influence the stats?

If the wheel is divided into equal parts barring the zero, let's say 12 parts of three numbers each; will the LoTT apply more favourably to this situation over twelve spins?