Hi to all of you guys here May this thread fits on this section. A friend of mine gave me this enigma. It is written in Excel format. Since here I cant attach .xls file, I don't know how to put the file, name Enigma.xls. There are infinite amount of tables, with ten rows (row 0,1,2, .9) each. Inside of each tables, there are numbers from 1 to 92, 93 to 184, 185 to 276, and 277 to 284, which lie on their certain rows. Here I gave the example tables that have been filled in for 40 tables. By finding the patterns/ formulas, my friend asked me to extend the tables to fill in the blank tables 41,42,43,etc as given beneath of Table 40. Just like SUDOKU, in each tables there will be no same numbers vertically, horizontally and diagonally. If these tables are using permutations from an ideal table that you can see beneath Table 40 (supposed the ideal table was right), then how to find the formulas of its permutations? Can somebody help me about this? Thx. Hope my English is good enough for explaining this.