# Work Out Double and Triple Letter Codes

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

Key stage:  KS 2

Curriculum topic:   Spatial and Non-Verbal Reasoning

Curriculum subtopic:   Find the Missing Code

Difficulty level:

### 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?

## Column B

B
Three Horizontal Dots
C
Straight Line On Top
F
Curved Line On Top
U
Jagged Line On Top
A
No Dots
N
Three Vertical Dots

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

Have a look at the shapes below, code breaker.

Can you match the codes to their correct description?

## Column B

F
Stripey Shape
G
Dotty Shape
T
Shape Tilting Left
S
Shape Horizontal
D
P
Shape Tilting Right

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

Can you work out the code for the mystery symbol?

Look at the following shapes.

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

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.

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.

Have a look at the shapes below, code breaker.

Can you match the code to the correct description?

## Column B

B
Flag Split Diagonally
R
W
Blank Flag
D
Flag Split Vertically Down The Middle
G
Blank Circle At The Bottom
N

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.

Last question coming up!

Have a look at the shapes below, code breaker.

Can you match the code to the correct description?

## Column B

R
Horizontal Position On The Top Left Side
H
Vertical Position On The Bottom Right Side
P
Horizontal Position On The Bottom Left Side
Q
Blank Triangles
S
T
Vertical Position On The Top Left Side
• 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?

## Column B

B
Jagged Line On Top
C
Curved Line On Top
F
Straight Line On Top
U
Three Vertical Dots
A
Three Horizontal Dots
N
No Dots
EDDIE SAYS
OK code breaker, how did you do? What did you notice about the images with C at the top of their codes? They both have a curved line on top of the main shape. This means that the first letter of the code tells us about the lines on the main shape. C = curved line on top B = jagged line on top F = straight line on top Now let's look at the bottom letters of the codes. There are two U's at the bottom of the codes and both of these images have three dots arranged in a vertical line. The bottom letter of the code tells us about what's inside the shape. U = three vertical dots A = three horizontal dots N = no dots 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?

Have a look at the shapes below, code breaker.

Can you match the codes to their correct description?

## Column B

F
Shape Tilting Left
G
Shape Tilting Right
T
Shape Horizontal
S
Stripey Shape
D
Dotty Shape
P
EDDIE SAYS
Did you crack the code here? How many matches did you find? All the images with G at the top of their codes have a parallelogram tilting to the right. The top letter of the code tells us about the positions of the parallelogram. F = tilting left G = tilting right T = laying horizontal If we look at the bottom letters of the code, this tells us about the pattern inside the shape. S = stripey D = dotty P = shaded It's time to tackle some more missing codes. Are you feeling up to the challenge?
• 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?

HW
EDDIE SAYS
Hope you weren't left out in the cold on this one! Did you manage to crack the snowman code? Remember to always start by looking for the pattern between shapes with the same code. The snowmen with a C at the start of their codes both have shaded buttons. So, we know that the first letter of the code must tell us about the snowmen's buttons! C = shaded buttons H = blank buttons Now, let's look at the second letters. The snowmen with T at the end have three buttons, so the second letter of the code tells us how many buttons the snowmen have. T = three buttons W = two buttons Our mystery Frosty the snowman has blank buttons (H) and there are two of them (W), which means his code is HW. 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.

EDDIE SAYS
Did you manage to decode our shapes here? Remember to always start by looking for the pattern between shapes with the same code first. We can see that F appears twice and both of these images are split into four segments. So, we've worked out that the top letter of the code tells us how many segments the image is split into. F = four segments S = six segments N = nine segments The mystery image has six segments, so let's make a note of the fact that it needs to have the code S on the top. Now, let's look at the bottom codes. There are two W's and both of these have two segments of the shape shaded. The bottom letter, therefore, must tell us how many segments of the shape are shaded. W = two shaded N = one shaded H = three shaded Our mystery image is split into six segments (S) and has two of them shaded (W), so the code we need here is SW. Did you get this? Do not worry if you didn't this time. On to the next one!
• 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?

EDDIE SAYS
Did you crack the code here? Did you spot a letter that came up more than once among the images? There are two C's in the top codes and both of these images have a cross as their biggest shape. The top code must tell us about the type of shape on the outside. C = cross on the outside E = rectangle on the outside V = oval on the outside If we look at the bottom codes, we can see that they are all completely different letters! What else changes in the image that this bottom code could stand for? The pattern inside the circle changes each time, so this must be what the bottom code tells us. D = dotty S = vertical stripes Z = horizontal stripes R = criss-cross pattern The mystery image is a rectangle (E) with a criss-cross pattern in the circle (R), so the code needs to be ER, which is the third option. Phew... are these codes getting trickier, letter detective? We know you have the skills though, so let's keep going!
• 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.

NH
EDDIE SAYS
Well, that's a lot of arrows - what are they pointing to? Both of the arrows with L at the start of their codes are pointing in a clockwise direction. This means that the first letter of the code tells us which direction the arrows are pointing in. L = clockwise N = anticlockwise The mystery arrow is pointing anticlockwise, so let's make a note of the code N. If we look at the second letters of the codes, there are two T's and both of these arrow lines are thin. The second letter of the code must tell us about the arrow line type. T = thin line H = thick blank line B = thick shaded line Our mystery arrow is pointing anticlockwise (N) and has a thick blank line (H), so the code we need here is NH. Excellent code cracking!
• 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.

UN
EDDIE SAYS
Did you look for the common letters? As always, we must start to solve the code by looking for a letter that appears more than once. In this case, the letter U appears twice and both of the shapes are in a vertical position. This means that the first letter must tell us about the position of the shape. U = vertical L = diagonal from top left to bottom right R = diagonal from bottom left to top right The mystery shape is also vertical, so it will get a code U at the start. Now, let's take a closer look at the second letters. There are two B's in these images and both of these shapes are completely shaded. The second letter must, therefore, tell us about the shading of the shape. B = all three are shaded T = two are shaded N = one is shaded The mystery image is in a vertical position (U) and has one shaded shape (N), so the code we were looking for here was UN. Did you get that? 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?

## Column B

B
R
W
Blank Circle At The Bottom
D
Flag Split Vertically Down The Mi...
G
Flag Split Diagonally
N
Blank Flag
EDDIE SAYS
How many matches did you find? Let's look at the letter B that appears twice. What do both of these flags have in common? They both have a shaded circle at the bottom. This means that the first letter of the code tells us about what's at the bottom of the flag. B = shaded circle R = shaded rectangle W = blank circle Let's look at the second letters of the codes. There are two G's and both of these flags are split diagonally. This means that the second letter tells us about the pattern inside the flag. G = split diagonally D = split through the middle vertically N = blank flag On to the next one, code breaker!
• 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.

BRZ
EDDIE SAYS
WOW! We had three letters to decode here...now, this was a bit of a challenge, code breaker! First, let's look at the front code. There are two D's in the front position and both of these triangles have dashed lines going through the middle. The first letter of the code must tell us about the lines going through the middle. D = dashed lines T = dotty lines B = dashed and dotty lines The mystery shape has a dashed and a dotty line, so we need to remember the code B for the start. For the middle code, there are two M's and both of these have squares inside. The middle letter tells us about the small shape. M = square R = triangle C = circle Remember, R as the mystery shape has a triangle... BR so far! There are two L's as the last part of the codes and both of these have the small shape in the top left corner. The last letter of the code tells us the position of the small shape. L = top left corner K = bottom right corner Z = bottom left corner The mystery image has its small shape in the bottom left corner (Z), so the code we need is BRZ. 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?

## Column B

R
H
Blank Triangles
P
Vertical Position On The Bottom R...
Q
Horizontal Position On The Bottom...
S
Vertical Position On The Top Left...
T
Horizontal Position On The Top Le...
EDDIE SAYS
Lots of codes to crack here! Let's start as always with the first letters. The images with R at the start all have shaded triangles. The first letter of the code tells us if the triangles are shaded or not. R = shaded H = blank There are two S's in the second letter position and both of these have triangles in a vertical position in the top left corner. The second letter of the code tells us the position of the triangles. Codes cracked! Great job detective, that is another activity solved!
---- OR ----

Sign up for a £1 trial so you can track and measure your child's progress on this activity.

### 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