Hardsum

HARDSUM is a math logic puzzle game built around 3x3 number grids. Each puzzle gives you a grid of cells with possible number choices. Your goal is to select the correct number in each cell so that every row and every column matches its target sum. The rules are simple, but solving each puzzle requires logic, deduction, and careful checking. Play daily puzzles, improve your solving speed, maintain streaks, and compare your performance on the leaderboard.