ArithBlock

ArithBlock: A Puzzle of Logic & Numbers

If you enjoy the focused logic of puzzles like Sudoku, ArithBlock offers a fresh twist.
Place numbered blocks on the board so that every square sums exactly to 10.
It’s simple to learn, yet surprisingly deep.

How to Play
- Switch between available blocks to plan your move.
- Rotate a block for the perfect fit.
- Drag it onto the board.
- Each block’s numbers add to the numbers already on the board.
- The sum in any cell cannot exceed 10.
- Fill the board to win!

Free to Start
- Play for free with puzzles of up to 5 blocks.
- Unlock puzzles with 6–10 blocks for a one-time purchase.
- No ads.

Features
- Easy to Learn: Understand the rules in seconds.
- Challenging to Master: Spatial and numerical thinking are both required.
- Endless Variety: A new solvable board is generated whenever you want.
- Adjustable Difficulty: From quick, casual puzzles to deep, multi-block challenges.
- Perfect for Short Breaks: Each puzzle is a compact mental workout.

A clean, ad-free puzzle experience—simple to pick up, hard to put down.