Codes and Matrices

This lesson covers two related NVR question types: shape codes and matrices. Both require you to identify patterns and rules, but they present them in different ways. Shape codes use letters to represent properties, while matrices use grids of shapes with a missing piece.

---

Part 1: Shape Codes

In a code question, each shape is labelled with a set of code letters. Each letter stands for one property of the shape (such as its size, colour, or type). Your task is to crack the code — work out what each letter means — and then apply it to a new shape.

How It Works

You are given several shapes, each with a code:

Shape	Description	Code
Shape 1	Large black circle	P R
Shape 2	Small black circle	Q R
Shape 3	Large white circle	P S
Shape 4	Small white square	Q S

Question: What is the code for a large black square?

Step-by-Step Decoding