I think it's pretty simple actually. Instead of looking at the whole picture, and then giving up almost instantly, why don't you study it for a second.
Do you know what SUMs are? Hell, SUM, in math, means addition, or adding them up. A SUM, in Pick 3, is the 3 digits added up. There's also Pair SUMs. Yes, that means adding 2 digits up. Pair SUM.
Instead of you and Wisconsin belittling the post, why don't you try figuring it out? We all have a brain right?
Now, if you look at the pairs he's posted, you can see they add up to the SUMs.
SUM 0: 00 0+0 = 0 SUM 0
SUM 1: 01 10 0+1=1, 1+0=1 SUM 1
SUM 2: 02 11 20 0+2=2, 1+1= 2, 2+0=2 SUM 2
SUM 3: 03 12 21 30 0+3=3, 1+2=3, 2+1=3, 3+0=3 SUM 3
SUM 4: 04 13 22 31 40 etc etc etc etc.
SUM 5: 05 14 23 32 41 50
SUM 6: 06 15 24 33 42 51 60
SUM 7: 07 16 25 34 43 52 61 70
SUM 8: 08 17 26 35 44 53 62 71 80
SUM 9: 09 18 27 36 45 54 63 72 81 90
SUM 10: 19 28 37 46 55 64 73 82 91
SUM 11: 29 38 47 56 65 74 83 92
SUM 12: 39 48 57 66 75 84 93
SUM 13: 49 58 67 76 85 94
SUM 14: 59 68 77 86 95
SUM 15: 69 78 87 96
SUM 16: 79 88 97
SUM 17: 89 98
SUM 18: 99
That's the first part. If you STILL, don't understand the first part, then I don't even know what else to tell you. It's really simple.
Next, He talks about joining the SUMs.
I propose to join the sums:
Sum 0 + Sum 10
Sum 1 + Sum 11
...
Sum 9
What do you do with it?
where you see the "..." is the whole list, but he didn't type it out.
SUM 0, which he shows in the first post is 00
SUM 10, which he shows in the first post is 19 28 37 46 55 64 73 82 91
If you look at his 2nd post, you'll see it says
SUM: (00 SUM 0)(19 28 37 46 55 64 73 82 91 SUM 10)
SUM:(01 10 SUM 1)(29 38 47 56 65 74 83 92 SUM 11)
Do you get it now?