Rules In Detail. R stands for how many things you are choosing. So the number of.
A combination is a way to order or arrange a set or number of things uniquely The formula for a combination of choosing r unique ways from n possibilities is.
R stands for how many things you are choosing. In our case we get 336 permutations from above and we divide by the 6 redundancies for each permutation and get 3366 56. P n r 10. Sudoku puzzles can be studied mathematically to answer questions such as How many filled Sudoku grids are there What is the minimal number of clues in a valid puzzle and In what ways can Sudoku grids be symmetric through the use of combinatorics and group theory.