Number Sum Puzzle - Math Game

Challenge your brain with Sum Puzzle — the addictive number sums math puzzle loved by fans of Sudoku, Kakuro, and Nonogram. Remove numbers from the grid so the remaining values in each row and column add up exactly to the target sums on the edges. Simple rules. Infinite "aha!" moments.

Every puzzle is handcrafted with one unique solution. No timers. No pressure. No mid-puzzle ads. Just pure logic and mental math — the perfect brain game for puzzle lovers who want a calm, focused challenge.

HOW TO PLAY SUM PUZZLE
• Each grid shows numbers with target sums displayed along the right side and the bottom.
• Tap the check button to circle a number (marks it as kept in the sum).
• Tap the erase button to remove a number from the grid.
• Your goal: make every row and every column reach its exact target sum at the same time.
• Every puzzle has one — and only one — correct solution. Can you find it?

It sounds simple, but the deeper you go, the more you'll appreciate the elegant logic behind every layout. Start with a 3x3 warm-up, work your way to a 10x10 boss-level grid, and feel your mental math sharpen along the way.

KEY FEATURES
• Levels for Everyone — From quick 3x3 grids for complete beginners to sprawling 10x10 challenges for seasoned math puzzle experts.
• Daily Brain Workout — Make it a daily habit. Sharpen focus, arithmetic speed, and pattern recognition a few minutes at a time.
• Zero Mid-Puzzle Ads — We respect your concentration. Solve in peace. No interstitials pop up to break your flow.
• Fully Offline — Play anywhere, anytime. No internet, no account, no sign-in. Perfect for flights, subways, and waiting rooms.
• Dark-Mode Friendly — Sleek, minimalist design that's easy on the eyes day or night. Perfect for late-night brain training.
• Handcrafted Puzzles — Every single level is hand-designed and verified for a unique, elegant solution. No auto-generated filler.
• Endless Replay Value — Hundreds of logic puzzles with more added in regular updates.

WHY YOU'LL LOVE SUM PUZZLE
• Relax and Sharpen Your Mind — Stress-free gameplay built for calm focus. No timers. No streak shaming. No pay-to-win. Just pure logic.
• Improve Mental Math — A natural workout for arithmetic speed, logical deduction, and pattern recognition. A real brain game, not a gimmick.
• The Ultimate "Aha!" Moment — Feel that sat