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Identify Double and Triple Letter Codes

In this worksheet, students will identify double and triple letter codes by identifying common features among images.

'Identify Double and Triple Letter Codes ' worksheet

Key stage:  KS 2

Curriculum topic:   Spatial and Non-Verbal Reasoning

Curriculum subtopic:   Find the Missing Code

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

Get ready to be a code breaker!

 

Each of the shapes below has a matching code. We need to crack the code and then apply it to an extra shape.

 

 

In this type of question, the first thing we need to look for is a letter that appears as a code more than once.

We can see the letter P twice. What do both of these images have in common?

They are both made up of black shapes, so the letter P must mean that an image has three black shapes.

We can also see T used twice as a code. Both these images have two grey shapes and one black shape.

This means that the first letter in the code tells us about the shading of the image. What must S at the start mean?

That’s correct! S must mean two black shapes and one grey.

If we apply these findings, our mystery shape must begin with a code letter of S.

 

If we now look at the second letter in the codes, we see that D appears more than once. What do these images have in common?

They are both in a vertical position, so this must be what D means.

So the second letter tells us about the positioning of the image.

U is used as code for a diagonal from top left to bottom right.

F is the code for a diagonal from bottom left to top right.

 

Therefore, the code for our final shape is SU.

S for two black shapes and one grey shape, and U for a diagonal from top left to bottom right.


 

Let’s try another one with a three-letter code this time:

Which code should the final shape have?

 

 

We can see the letter J appears twice, what do these two images have in common?

They both have an unshaded shape inside the main shape. This means that H is used for a shaded shape on the inside and J is used for an unshaded shape on the inside. If we apply this logic, then our mystery image must have an H in the middle of its code.

 

What do the two images with a G in their code have in common?

They both have circles inside, so G means a circle inside and S means a square inside. If we apply this logic, then our mystery image should have an S at the end of its code.

 

Finally, what could the first letter of the code stand for as they are all different?

The only other feature that changes between the images is the type of shape used as the outer shape.  

The letter Z must be used for an oval, which is the same as our mystery image.

 

If we bring this all together, our mystery image should have the code ZHS.

Z - oval on the outside

H - shaded shape on the inside

S - square on the inside


 

It’s now your turn to crack some codes!

Good luck detective.

Welcome code breaker, we're pleased to see you!

 

Have a look at the shapes below.

Can you match the code to the correct description?

 

 






OK, one down -  are you ready for the next one?

 

Have a look at the shapes below, code breaker. 

Can you match the code to the correct description?

 






Here's another puzzle for you to have a go at, code breaker. 

 

Can you work out the code for the mystery symbol?

 

 

BDW

FLW

FDW

FDN

FDG

Look at the following shapes. 

Use their codes to help you work out the code for the mystery shape.

 

TLR

TDR

GLR

TDQ

BDQ

Let's keep going with this, code breaker, you're on a roll!

 

Can you work out the code for the mystery symbol?






You know the drill now, code breaker! 

 

Look at the shapes below.

Use their codes to help you work out the code for the mystery shape. 

 

 

TD

PL

TT

TL

PD

Here's another challenging one for you, code cracker.

 

  Look at the shapes below. 

Use their codes to help you work out the code for the mystery shape. 

 

 

SLD

SLQ

SLR

FLD

SBD

Have a look at the shapes below, code breaker. 

 

Can you match the code to the correct description?

 

FCU

FCL

FSL

TCL

TWU

Are you ready for the next challenge, code breaker?

 

Look at the shapes below. 

Use their codes to help you work out the code for the mystery shape. 

 

YFP

YFQ

ZFP

ZFQ

ZDP

Last question coming up! 

 

Have a look at the shapes below, code breaker. 

 

Can you match the code to the correct description?

 

 

CDF

TDF

CDY

TPF

TPY

  • Question 1

Welcome code breaker, we're pleased to see you!

 

Have a look at the shapes below.

Can you match the code to the correct description?

 

 

CORRECT ANSWER
EDDIE SAYS
OK code breaker, how did you do? What did you notice about both of the images with R at the top of their codes? They have rectangular flags. The top letter of the code tells us about the shape of the flag. R = rectangular flag D = triangular flag G = flag with a curve Now, let's look at the bottom letter of the codes. Those with a C at the bottom have two dots inside the flag. The bottom letters tell us how many dots are in the flag. C = two dots P = one dot T = no dots The mystery shape has a curved flag (G) and two dots (C), so the code we need is GC which is the first option. Did you follow this? If you didn't get it right first time, don't worry - these things take practice!
  • Question 2

OK, one down -  are you ready for the next one?

 

Have a look at the shapes below, code breaker. 

Can you match the code to the correct description?

 

CORRECT ANSWER
EDDIE SAYS
Did you crack the code here? What did you notice about both of the images with D at the top of their codes? They have dots inside their small shapes. The top letter of the code tells us about the pattern inside the small shape. D = dotty shape W = diagonal stripes S = horizontal shapes Now, let's look at the bottom letter of the codes. Those with a T at the bottom have the small shape positioned at the top of the square and those with a B at the bottom have the small shape positioned at the bottom of the square. The mystery shape has a horizontal striped pattern (S) and the small shape is positioned at the bottom (B), so the code we need is SB which is the second option.
  • Question 3

Here's another puzzle for you to have a go at, code breaker. 

 

Can you work out the code for the mystery symbol?

 

 

CORRECT ANSWER
FDW
EDDIE SAYS
Did you manage to crack the code? The trick is to look for a letter that appears more than once. We can see that B appears twice at the start of the three-letter code, and the fish are facing to the right in these images. The first letter of the code tells us which way the fish are facing. B = facing right F = facing left Now, let's look at the middle letter of the code. The images with an L in the middle have a blank eye, which means that the middle letter must tell us about the shading of the eye. L = blank eye D = shaded eye Finally, let's look at the last letters and there is a W when there are wavy water lines and an N when there aren't. Our mystery fish is facing to the left (F), with a shaded eye (D) and has wavy water lines (W), so the code she needs is FDW. Keep using those detective skills!
  • Question 4

Look at the following shapes. 

Use their codes to help you work out the code for the mystery shape.

 

CORRECT ANSWER
TDQ
EDDIE SAYS
That's another three-letter code to keep you on your toes, letter detective! There wasn't a single letter repeated in the first letter of the codes, so let's start with the middle letter instead. There are two L's here, and both of these images have a blank shape in the middle, so we know that the middle letter must tell us about the shading of the middle shape. L = blank middle shape D = shaded middle shape Now, let's look at the last letter. We can see that two of the images have an R as the last letter of their code. Both of these images have a circle in the middle, so we know that the last letter must tell us about the shape in the middle. R = circle in the middle Q = square in the middle Now, let's go back to the first letter. What other things about the images have we not looked at yet? We haven't looked at the outside shape, and this is different in all three images, so we now know what the first letter of the code is telling us.... the shape of the outside shape. G = rectangle on the outside B = oval on the outside T = hexagon on the outside Our mystery shape has a hexagon on the outside (T), a shaded shape in the middle (D) and a square in the middle (Q), so the code we need is TDQ. We got there! Remember, if it looks tricky, always look for the code that appears more than once, even if this isn't the first letter of the code!
  • Question 5

Let's keep going with this, code breaker, you're on a roll!

 

Can you work out the code for the mystery symbol?

CORRECT ANSWER
EDDIE SAYS
Did you crack the code here? First, we need to find the common letter among the top codes. We can see R twice. Both of these images have a triangle in the middle. The top letter of the code tells us where the triangle is. R = triangle in the middle C = triangle at the bottom Z = triangle at the top Now, let's look at the bottom code. Those with a T have a horizontal rectangle at the bottom, so the bottom letter of the code tells us where the rectangle is. T = rectangle horizontally across the bottom D = rectangle vertically at the bottom W = rectangle horizontally across the top In our mystery shape, the triangle is at the bottom (C) and the rectangle is placed vertically at the bottom (D), so the code is CD.
  • Question 6

You know the drill now, code breaker! 

 

Look at the shapes below.

Use their codes to help you work out the code for the mystery shape. 

 

 

CORRECT ANSWER
TL
EDDIE SAYS
Well, that's a lot of arrows, what are they pointing to? We can see the code P appearing at the beginning twice, and in both of these images the arrow points to the left. So, the first letter of the code tells us about the direction of the arrow. P = left T = up R = down Let's now have a look at the second letter of the code. There are two D's and two L's. The arrows with D have shaded parts and the arrows with L have blank parts. The mystery image is pointing up (T) and has a blank part (L). Excellent code cracking. Nice job detective!
  • Question 7

Here's another challenging one for you, code cracker.

 

  Look at the shapes below. 

Use their codes to help you work out the code for the mystery shape. 

 

 

CORRECT ANSWER
SLD
EDDIE SAYS
Did you look for the common letter? There are two T's in the first letters of the codes. What do these images have in common? They are both triangles, which means our first letter must tell us about the shape type. T = triangle S = hexagon F = rectangle There are two B's in the middle code and both of these are shaded on the left-hand side. The middle code tells us about the pattern on the left side of the shape. B = left side shaded W = left side blank L = left side striped There are two Q's in the last code letters and both of these images are striped on the right-hand side. The final letter tells us about the pattern on the right side of the shape. Q = right side striped D = right side shaded R = right side blank The mystery shape is a hexagon (S), striped on the left (L) and shaded on the right (D), so the code is SLD. Keep up the great work, code breaker, you've got this!
  • Question 8

Have a look at the shapes below, code breaker. 

 

Can you match the code to the correct description?

 

CORRECT ANSWER
FCL
EDDIE SAYS
Another mammoth three-letter code, letter detective! We are working really hard! There are two F's at the beginning of the codes, and both of these images have horizontal rectangles. The first letter tells us about the position of the rectangle. F = horizontal rectangle T = vertical rectangle There are two W's in the middle code, and both of these images have bold arrows. The second letter of the code tells us about the arrow type. W = bold arrow S = thin arrow C = thick blank arrow Finally, let's look at the last letter of the code. There are two U's in the final position and in these images the arrows are pointing up. The final letter tells us the direction the arrows are pointing. U = pointing up R = pointing right L = pointing left So, our mystery shape has a horizontal rectangle (F), a thick blank arrow (C) and is pointing left (L). So the missing code is FCL. We did it!
  • Question 9

Are you ready for the next challenge, code breaker?

 

Look at the shapes below. 

Use their codes to help you work out the code for the mystery shape. 

 

CORRECT ANSWER
ZFP
EDDIE SAYS
These triangles look like they have legs! There are two Z's at the start of the codes and these shapes both have triangles at the top left of the square. So, the first letter must tell us about the position of the triangle. Z = triangle in top left Y = triangle in top right Our mystery shape has a triangle in the top left, so we need to remember Z. There are two T's in the middle code and both of these images have vertical lines. The middle code tells us about the pattern inside the triangle. T = vertical lines F = horizontal lines D = diagonal lines The mystery shape has horizontal lines, so make a note of the letter F. Now, for the final code! There are two P's and both of these images have two legs, so this last letter in the code must tell us about the number of legs the triangle has. P = two legs Q = one leg X = three legs Our mystery shape has two legs, so the final letter of the code is P, and the full code we needed to find was ZFP. Did you keep up? These ones are tricky but the more you do, the easier they will become.
  • Question 10

Last question coming up! 

 

Have a look at the shapes below, code breaker. 

 

Can you match the code to the correct description?

 

 

CORRECT ANSWER
TPY
EDDIE SAYS
Lots of codes to crack here! Let's start as always with the first letters. The images with C at the start have an arrow pointing left. The first letter of the code must tell us which way the arrow is pointing. C = pointing left T = pointing right There are two D's in the middle position, and both of these images have shaded rectangles on top. The middle letter of the code tells us about the pattern in the top shape. D = top shape shaded P = top shape blank So far our mystery shape is coded TP... There are two F's in the final position, and these have stripey rectangles at the bottom. The final code tells us about the pattern of the bottom rectangle. F = bottom shape stripey Y = bottom shape dotty Our mystery shape has a dotty shape on the bottom, so the final part of our code is TP...Y! We did it! Great job detective, that is another activity solved!
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