Try kenken

About this idea

Solve these mathematical logic puzzles that combine Sudoku's grid-filling with arithmetic operations. KenKen (Japanese for 'wisdom') uses cages (outlined groups of cells) with target numbers and operations (+, -, ×, ÷). Fill the grid so each row and column contains unique digits (1-6 for 6x6 puzzles) while making each cage's math work.

Start with 4x4 beginner puzzles, progress to 9x9 advanced grids. KenKen strengthens mental math, logical deduction, and problem-solving without requiring advanced mathematics. com), and mobile apps. Created by Japanese educator Tetsuya Miyamoto to make math fun.

How to get started