Equation Grid
Place the digits 1 to 9 in a 3×3 grid so that every row and every column is a true equation. A new puzzle every day at four levels, each with exactly one solution you reach by logic, never by guessing.
How to play
Place the digits 1 to 9, each once, so that every row and every column is a true equation. Multiply first, then add and subtract from left to right (top to bottom in columns). Full guide →