About game
Math puzzles often feel like a digital workout for your brain that actually feels rewarding when the pieces finally click. Cross Sums turns basic arithmetic into a tense strategy challenge where every click changes the entire board layout. You start by analyzing the target totals displayed at the edges of your grid. Selecting a number removes it from the board, which instantly updates the sums for both that row and the intersecting column. Keeping your mental math sharp is the only way to avoid painting yourself into a corner while aiming for those perfect totals. Each level forces you to balance multiple constraints simultaneously, making Cross Sums a clever twist on traditional logic games. You can play this addictive brain training puzzle directly in your browser without any downloads or registration.
How to play
Look at the hints: the numbers on the edges of the grid show the required amount for this row or column.
Remove unnecessary items: click on the numbers inside the table to remove them if the amount in the row exceeds the target.
Save what you need: leave only the numbers that add up to the exact number on the edge panel.
Watch out for intersections: deleting a number from a row changes the amount in the intersecting column as well.
Win: the level is considered completed when all the rows and columns simultaneously converge to the correct amounts.
Features
- Dynamic Grid Updates: Every removal shifts the math for both horizontal and vertical lines in real time.
- Strategic Deduction: Identify which digits are mathematically impossible to keep to narrow down your choices.
- Progressive Complexity: Grids grow in size and numerical density as you master the basic patterns.
- Zero Guesswork: Rely on your logical reasoning rather than luck to clean the board.
Who is it for
Puzzle lovers who enjoy numerical challenges and logic games will find this satisfying. Fans of classic brain teasers like Sudoku or nonograms looking for a fresh arithmetic twist will appreciate the clean design. Casual players seeking a quick but demanding mental exercise will feel right at home.
Controls
Select number
Click on the cell with your mouse or tap it on mobile.
Clear digit
Tap or click a number to toggle its removal from the board.
FAQ
How do I win at Cross Sums?
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You must remove numbers until the sum of the remaining digits in every row and column matches the target total provided on the grid edges.
Is Cross Sums free to play?
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Yes, Cross Sums is completely free to play in your web browser with no download required.
Does Cross Sums track my progress?
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The game allows for endless play, letting you tackle new logic puzzles in Cross Sums whenever you want to test your math skills.
