Addition Puzzles: They add Horizontally to the side sum, vertically to the bottom sum, diagonally as well. Numeraly 1 to 9, but no zeros.
Quarters: Sudoku pattern but only 4 to a line or square.
Sixths: Sudoku pattern but only 6 to a line or square.
Sudoku. Standard, but also using colours, and other items. Some are solutions.