Sudoku boxes being filled in on a board with a number 3 being the top left most number.
A game of Sudoku in progress. the bottom row says 1 and 7.
a white board has a grid on the top right with numbers like 3 and 5 on it
The corner of a whiteboard playing soduko and number 5 on the top row
A sudoko board, the numbers on the left side are 3, 9, 4, 8 and 2.