Number Sums

About Number Sums

Features

• Dynamic Board Sizes: Scale your challenge from quick 3x3 grids to expert-level 7x7 and larger formats.
• Dual Interaction Modes: Seamlessly toggle between 'Circle' (Keep) and 'X' (Eliminate) to manage your logic.
• Deterministic Logic: Every puzzle is mathematically verified to have exactly one correct solution—zero guessing required.
• Infinite Playability: Experience a never-ending supply of unique grids that ensure you never solve the same puzzle twice.

How to Play

1. Examine the target numbers displayed at the end of each row and at the bottom of each column.
2. Tap or click a number to circle it if you believe it is part of the sum for that row and column.
3. Toggle the mode to 'X' out numbers that you have logically deduced cannot be part of the final total.
4. Balance all rows and columns simultaneously so their internal sums match the target edge numbers to win the level.

Tips & Strategy

• Start with the biggest or smallest target numbers; a row with a target of '3' or '25' often has very few possible combinations.
• Use the 'X' mode aggressively! Eliminating numbers that definitely cannot be part of the sum is just as important as circling the right ones.
• Check the intersections—if a number is eliminated for a column, it is automatically gone for that row as well.
• Keep an eye on the remaining total; the game often updates the 'current sum' in real-time to help you see how far you are from the target.

FAQ

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Game Info

Controls