Sorry for the dumb Q but how exactly does it work ?

Is it just a case of 4-5 pack * so many 10s and just count backwards how many are left vs the cards for increased % ?

I went to my local casino the w/e, its small and very local i was hoping for a limit game but all they have is BJ and Roulette. The roullete has a 5*bet for 2:1 and 1:1 bets so I don't have the BR to play my normal system of waiting for 3-5 misses and then bet and double up until it comes

I was going to play BJ but there seemed some decent players there and I didnt want to embaress myself. I did walk away with 10 chips though to practice tricks and I can now shuffle 10 chips (i.e. T10 split to two T5 stacks and then shuffled back to the T10

I'm hoping they still have holdem tourneys on Thursdays and I'll be saving my chip tricks for when i go for a bluff