The Best Pair Systems that I have used so far for NC are by Lotto Laughs: 1) Patience is a Virtue system, and 2) The Scoop System. These two systems work consistently well on a weekly basis in NC for Pairs. Then you would add the digits 0 - 9 to complete your 3 digit number.
Do a SEARCH in Lottery Systems FORUM, ALL HISTORY, for more information on these two systems.
Basically, for PATIENCE IS A VIRTUE, you add + 71 or +72 to the Front Pair of the last number drawn, using lottery math. You can use either Midday or Evening Numbers.
Example:
NC. Sat 7/10/2010 Mid = 467
Eve = 394
467 467
+71 +72
____ _____
17 18
Choose your favorite pair to play, or play both pairs . Then Add your Digits 0 - 9. You will have either 10 or 20 numbers to play.
Results:
Mon 7/12 Mid = 176 [71]
Thur 7/15 Mid = 170 [71]
Tues 7/18 Eve = 018 [72]
Sat 7/17 Mid = 481 [72]
The Scoop: Add +12 to the Back Pair of the Last number Drawn using Lottery Math. You can use either Midday or Evening Numbers. Lotto Laughs suggested arranging the number drawn in ascending order first, ex. 791 would be 179, then add +12 to the Back Pair. However, I have discovered that this is not necessary, because it works either way in NC. In NC, you should also try + 13 added to the Back Pair, this number works well also.
Results:
467 467
+ 12 + 13
_____ ______
79 70
Thur.7/15 Mid = 170 [13]
Fri. 7/16 Mid = 987 [12]
Fri. 7/16 Eve = 974 [12]
These are the Primary 2 Pair Systems that I rely on that work well consistently on a weekly basis in both NC and SC. You have to Back Test and see which day's data works the best on a weekly basis, i.e. Sunday, Monday, Tuesday, etc. If you do this workout on a daily basis rather than a weekly basis, you will be playing overlapping sets of numbers. That's why it's better to choose a day that hits most often and stick with it.
Hope this helps. Good Luck to you.