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Apply the Pattern to Crack the Letter Code

In this worksheet, students will turn words into code and turn coded words back into their original words. This will develop their encoding and problem solving skills.

'Apply the Pattern to Crack the Letter Code' worksheet

Key stage:  KS 2

Curriculum topic:   Verbal Reasoning

Curriculum subtopic:   Letter Code Breaking

Difficulty level:  

Worksheet Overview

Welcome to a new code cracking activity!

 

As you may know by now, there are several different types of codes.

For example: when you turn a word into code, each letter can be represented by a different letter.

 

Below is the alphabet 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


Let’s look at a question:

If the code for TRAIN is SQZHM, what is the code for RHYME?

 

Green steam train

 

First, we need to use the alphabet line to see how the letters are changing.

 

If we look at how T becomes S, we can see that the letters are all jumping one place backwards in the alphabet. This same pattern applies for the other letters in the word TRAIN.

 

If we apply the same rule to the word RHYME, we discover that the coded version of the word is QGXLD.


Sometimes, we have to work backwards from a given code, for example:

 

If SJWFS is the code for RIVERQFBDI is the code for ____.

 

First, we need to work out how the coded word becomes the word RIVER when it is decoded.

 

All of the letters jump back one place in the alphabet.

 

So we must do the same for QFBDI.

 

If we do this, we find that the missing word is PEACH

 


 

In this activity, you will be a code cracker and work out which code represents a word and turn coded words back into their original words.

 

edplace 11+ detective

  Pssst!!            

Here's a handy hint to help you reach superstar status:            

Don’t forget to use the alphabet. You can write what the coded letter is above it.

 

Good luck, code cracker!

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