How to solve 3x3 matrices

Spatial

Infer the rule across a 3x3 grid of figures and choose the missing cell.

Worked examples

Answers shown

Follow the steps on real items before you practise.

Difficulty 4

Which figure completes the 3x3 matrix?

Answer: D. Here is why:

Each cell's dot count equals its row plus column index plus one. The bottom-right cell is 2 + 2 + 1 = 5 dots.