# Work Out the Difference Between each Sequence Value

In this worksheet, students will work out the next two letters in an alphabetic sequence. This will develop students’ problem solving and code-breaking skills.

Key stage:  KS 2

Curriculum topic:   Verbal Reasoning

Curriculum subtopic:   Letter Sequences

Difficulty level:

#### Worksheet Overview

Hello letter detective, time for a letter puzzle! Can you help us to solve the challenge below?

We are going to look at the alphabet in a different way than you usually would.

In this activity, you will be working out sequences that use letters of the alphabet.

Some will be in alphabetical order, while others will be in reverse alphabetical order.

Here is are two alphabet charts for you to use as a reference:
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Z Y X W V U T S R Q P O N M L K J I H G F E D C B A

Take a look at the following alphabetic sequence:
AC, DG, HL, _
What are the next two letters in the sequence?

First, put your fingers on the letters A and C on the alphabet line above.Then move them to D and G.
Then move them to H and L.

What do you notice?

The pattern is that the gap between each pair of letters widens by one each time like this: A_C, D_ _G, H_ _ _L etc.

If we apply this pattern then we get MR.

So the sequence would be: AC, DG, HL, MR, etc…

Did you manage to spot this?

In this activity, you will be a sequence superstar and work out which two letters come next.

 Pssstt! Here's a handy hint to help you reach superstar status: Don't forget to use the letter line to help you work out the jumping pattern.

Good luck, letter sequencer!

### What is EdPlace?

We're your National Curriculum aligned online education content provider helping each child succeed in English, maths and science from year 1 to GCSE. With an EdPlace account you’ll be able to track and measure progress, helping each child achieve their best. We build confidence and attainment by personalising each child’s learning at a level that suits them.

Get started