81 squares on a sudoku grid
if the question were 81 S in a S P the answer would be 81 Squares in a Sudoku Puzzle so the extra S letter is a mystery unless 81 Squares in a Standard Sudoku Puzzle as there are other variations
81 = square of nine
The square root of 81 is an integral number.
81
27
A = s^2 81 in^2 = s^2 √(81 in^2) = √s^2 9 in = s Thus the side of the square is 9 inches.
The factors of 81 are 1, 3, 9, 27, 81. For them to be common, they need to be compared to another set of factors.
3 x 3 x 3 x 3 = 81
The product of 9 and 9 is 81
27
nine is goes in to the number 81