Today we looked at strategies for solving a tricky version of a popular puzzle. Usual Sudoku rules apply – numbers 1 to 9 in every row, column and box – but in this version you don’t get any starting numbers, just the total sum of the numbers in each dotted box.
Hint: The numbers 1-9 add up to 45, see if you can use that fact and the bottom left square to calculate this number (see how one of the dotted boxes overlaps the squares):
12 + 7 + 16 = 35. This helps a lot!