Hey David, I have something I want to tell about pairs eleven of the to be exactly okay, here we go it's called "11 Power Pairs" and here what the breakdown "05,07,16,18,25,27,29,36,38,47,49" these pars make up "510" Straight numbers and "96" Boxed with "66" doubles But if you also add these pair L/H EE= 06,08,26,28,46,48 & L/H OO= 15,17,19,35,37,39 with this you would be tracking "738" and "600" of that is Singles and 138 Doubles no Triples,no HHH/LLL and there's 180# EEE & OOO "90" numbers each and if you boxed "738"straight it would be "146#" boxed.