About game
Math puzzles turn dull addition into a sharp mental workout that keeps your brain firing on all cylinders. Build the Sum: Number Crossword forces you to look at digits differently by turning basic arithmetic into a strategic grid hunt. You tap specific cells to reach target totals for every row and column while managing a restricted pool of energy. Every selection counts because running out of moves ends your session abruptly. Planning your path through the grid requires genuine concentration instead of mindless clicking. You can unlock power-ups to undo mistakes or gain extra fuel when the math gets tight. This number crossword scales in difficulty as you progress, ensuring you never run out of fresh challenges. Build the Sum: Number Crossword is available to play right now in your browser without any downloads or registration.
How to play
Select numbered cells to build the required sums for each row and column. Complete the level by matching all target sums.
Click or tap a cell to select it, and click or tap again to remove the selection. Every move uses energy, so plan your choices carefully.
If you run out of energy before completing the puzzle, the level is lost. Use boosters to get hints, undo moves or gain extra energy when you need it most
Features
- Energy management: Strategic planning is essential as every tap drains your limited energy reserves before the puzzle completion.
- Target summing: Each grid level demands precise arithmetic to match the required sums displayed at the edges of the rows.
- Booster system: Use special items to recover energy, revert incorrect moves, or reveal hidden clues when you are stuck.
- Progressive scaling: The complexity grows steadily with larger grids and more intricate combinations of digits to calculate.
Who is it for
Puzzle lovers who enjoy logical challenges and mental math practice will find this game addictive. Casual players who want a quick brain teaser during a break will appreciate the intuitive mechanics, while fans of Sudoku and number-based logic games will enjoy the strategic depth required to clear each board.
Controls
Select cell
Tap or click on a numbered cell to include it in your active sum.
Deselect cell
Tap or click the selected cell again to remove it from your calculation.
FAQ
How do I win in Build the Sum: Number Crossword?
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You win by selecting cells that add up to the target totals for every row and column before your energy runs out.
Can I play Build the Sum: Number Crossword on my phone?
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Yes, you can play directly in any mobile browser by tapping the cells to interact with the grid.
Are there limits to playing Build the Sum: Number Crossword?
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Every move consumes energy, so you must plan your steps carefully to complete the level before your energy reaches zero.
