Number Sums

Number Sums - Play Online

Number Sums is a brain-crushing logic puzzle. Math meets grid strategy. Developed by Drivix Games, this challenge demands precision. Circle numbers. Hit target sums. Every row, column, and colored region must match. One solution per puzzle. Find it.

How to Play Number Sums

The Goal: Make the numbers work. Each row, column, and colored region has a target sum displayed on the board edges and inside regions. Circle the right numbers. Erase the rest. All targets must be satisfied simultaneously. Sounds easy? Think again.

Core Mechanic: Circle, Erase, Calculate

Tap a number to circle it. Tap again to erase. Use the toggle switch at the bottom to switch between Circle Mode and Erase Mode. Faster workflow. Check the green target boxes on the side of each row and column. Add up your circled numbers. Match the target. Miss by one? Start over. The grid starts from 3x3 and scales up to 10x10 boards. Higher grids = harder sums.

Progression: Unlock Bigger Grids

Beat a puzzle. Unlock the next. Early levels use small grids. Easy targets. Later? 10x10 monsters with overlapping regions. Each level has exactly one solution. No guessing. Pure logic. The difficulty curve is brutal. Perfect for mental math training.

Strategy: Think Globally, Act Locally

Don't solve row-by-row. Big mistake. Cross-reference columns and regions. A number circled in Row 1 affects Column 3 and the yellow region. Work backwards from high-value targets. If a row needs 20 and only has two cells left, the math is obvious. Use the eraser liberally. Mark numbers you know are wrong. Process of elimination wins games.

Key Features

• Board Sizes: 3x3 to 10x10. Scales from tutorial to expert.
• One-Solution Design: No ambiguity. Pure logic puzzles.
• Toggle System: Circle/Erase modes. Clean UI for mobile or desktop.
• Minimalist Graphics: Flat design. High contrast. Zero lag. Runs on anything.
• Mental Math Training: Sharpen addition skills. Fast.
• Free to Play: No downloads. Browser-based HTML5.

Who is Number Sums for?

Perfect for puzzle addicts and math nerds. Great for 5-minute brain breaks or hour-long grinding sessions. If you like Sudoku, Kakuro, or Nonograms, this is your next addiction. Adults 25+ looking for low-stress mental workouts will dominate here.

Release Date & Developer

Number Sums was developed by Drivix Games. Released on September 25, 2025.

Controls

• Mouse Click / Tap: Circle or erase a number
• Toggle Switch: Switch between Circle and Erase modes