# How can I use number patterns to work out a sequence?

## What is a number sequence?

A **number sequence** is a **list of numbers** that is **linked by a rule** or **pattern**.

If you work out the rule, you can work out the next numbers or a missing number in the sequence.

The simplest number sequence is **1**, **2**, **3**, **4**, **5**…and so on.

The rule is that you **add 1** each time.

Here’s another sequence. Can you spot the rule?

**2**, **4**, **6**, **8**, **10**…

The rule is that you **add 2** each time. Did you spot that this sequence is the same as the **2 times table**?

Sequences can go down as well as up. Can you spot the rule here?

**50**, **45**, **40**, **35**, **30**…

The rule is that you **subtract 5** each time. Well done if you spotted that.