Tricky SUMS puzzle is for math lovers especially who love to play number puzzle games like Sudoku and Kakuro. These simple sums will make you CRAZY! Just need to place numbers in a grid in such a way that row/column sums are matching. Each number exactly placed 6 times in easy puzzle and 9 times in hard puzzle. Ex: - 1+2+3=6, 9+9+9=27, 2+2+6=10 and etc.