Matrix 3×3

Find the missing number in a 3×3 matrix where rows and columns follow hidden rules.

How to play

A 3×3 grid of numbers follows a rule across its rows and/or columns, with one cell left blank. Work out the rule and fill in the missing value.

• Check rows and columns for a shared arithmetic or pattern-based rule.
• The 3×3 board is the smallest and most direct size to start with.
• No paper or calculator — do it in your head.

Why this matters

A 3×3 grid with one missing cell is the exact item format of Raven's Standard Progressive Matrices, the most widely used nonverbal fluid-reasoning test — this size is the entry point before rules get layered across more rows and columns. Read more about the Raven's Progressive Matrices.

This game trains