beyond 0,1,2 we can form pairs or pairs 7,8,9 at the other end we have 9 Pair then with 0.1.2 x 7.8.9 07 08 09 17 18 19 27 28 29 We can positional 1ª,2ª 1ª,3ª 2ª,3ª By no excel 2010 or higher in any state