# Find 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
Middle Shape Is A Triangle
S
Blank Shape Inside
C
Stripey Shape Inside
T
Middle Shape Is A Circle
R
Middle Shape Is A Square

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

Have a look at the shapes below, code breaker.

Can you match the code to the correct description?

## Column B

B
Three Lines Coming Out Of The Top
D
Two Lines Coming Out Of The Top
T
W
A Blank Light bulb

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

Can you work out the code for the mystery symbol?

Can you work out the code for the mystery symbol?

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.

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.

Have a look at the shapes below.

Can you match the code to the correct description?

## Column B

H
S
Wearing A Cap
P
Wearing A Party Hat
B
Happy Face

Last question coming up!

Have a look at the shapes below, codebreaker.

Can you match the code to the correct description?

## Column B

G
One ball inside and two balls outside the shape
F
5-sided shape
B
4-sided shape
C
3-sided shape
P
Two balls inside and one ball outside the shape
• 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
Blank Shape Inside
S
Stripey Shape Inside
C
Middle Shape Is A Circle
T
Middle Shape Is A Triangle
R
Middle Shape Is A Square
EDDIE SAYS
OK code breaker, how did you do? The first question can often be a tricky one! What do you notice about the two images with B at the beginning of their codes? They have blank shapes inside, which must mean that the letter B stands for a blank shape and the letter S stands for a stripey shape. B = blank shape inside S = stripey shape inside Now, let's look at the second code. Both of the images with C at the end have circles inside. This must mean that the second letter of the code is for the shape inside. C = circle T = triangle R = square Did you follow this? If you didn't get it right first time, do not 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 code to the correct description?

## Column B

B
A Blank Light bulb
D
T
Three Lines Coming Out Of The Top
W
Two Lines Coming Out Of The Top
EDDIE SAYS
Did you crack the code here? How many matches did you find? All the images with B have a blank light bulb. The first letter of the code tells us whether the light bulb is shaded or not. Let's look at the second letters. What do you notice about all of the images with T at the end? They all have three lines coming out of the top. This means that W is the code for two lines coming out of the top of the light bulb. Keep up the hard work, code cracker. Practice makes perfect!
• 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?

LS
EDDIE SAYS
Did you manage to crack the code? Remember to always start by looking for the pattern between shapes with the same code. We can see that B appears twice at the start and both of these shapes are circles. The first letter of the code is for the shape type. B = circle L = triangle D = droplet Let's look at the second letters of the code. Those with an S at the end are stripey, which means that the second letter of the code must tell us about the pattern inside. S = stripey P = dotty Our mystery shape is a triangle (L) with stripes (S), so it gets the code LS. Keep using those detective skills!
• Question 4

Can you work out the code for the mystery symbol?

WL
EDDIE SAYS
Did you manage to decode our clouds here? The clouds with a D at the start are dark and shaded, whereas the clouds with a W at the start are light and blank. D = shaded W = blank Now, let's take a look at these second letters. The clouds with H at the end of their codes have four raindrops, whereas the cloud with L at the end has only one raindrop. Our mystery cloud is blank (W) and has only one raindrop (L), which means the code must be WL. Which cloud would you rather stand under?
• 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?

JS
EDDIE SAYS
Did you crack the code here? Did you spot a letter that came up more than once amongst our happy and sad shapes? The shapes with M at the start of their codes are sad (miserable!) which must mean that the code J represents the happy shapes (joy!). The shapes with a T at the end of their codes are triangles, so the second letter is the code for the shape type. T = triangle S = square The mystery shape is happy (J) and a square (S) so the code we need here is JS. Did your skills cheer up those sad shapes?
• 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.

SD
EDDIE SAYS
Well, that's a lot of arrows, what are they pointing to? What do you notice about the two arrows that have W in their code? They both have wiggly- squiggly lines. The first letter of the code tells us about the line type. W = wiggly line S = straight line Let's now look at the second letters to work out the code here. The arrows with B at the end have a blank arrowhead, whereas the arrow with D at the end has a shaded arrowhead. The mystery arrow has a straight line (S) and a shaded arrowhead (D) so the code we want here is SD. Are you keeping up, letter detective? We're sure you're progressing in the right direction!
• 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.

TW
EDDIE SAYS
Bugs without any eyes... you don't see that every day! Let's start by cracking what the letter N means. It appears twice in the pictures above, and both of these bugs have only one pair of legs. This means the first letter tells us how many legs the bugs have. N = one pair of legs T = three pairs of legs Now, let's look at the second letters of the codes. The ones with a G at the end have shaded heads, whereas the one with a W at the end has an unshaded one. Our mystery bug has three pairs of legs (T) and an unshaded head (W), which gives us TW as the code for this little bug. Keep up the great work, code breaker, you've got this!
• Question 8

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.

QX
EDDIE SAYS
Now, this was a bit of a challenge, code breaker! Did you look for a letter that came up more than once? We can see that P appears twice at the beginning of the codes. What do these two shapes have in common? They are both triangles. This tells us that the first letter of the code is for the shape of the image. P = triangle Q = square R = circle Now, let's take a look at the other letter in the code. All of the shapes with a T at the end are striped and all of the shapes with an X at the end have little crosses inside them. Our mystery shape is a square (Q) and has crosses inside (X) so our missing code is QX. Did you keep up? These ones are tricky but the more you do, the easier they will become.
• Question 9

Have a look at the shapes below.

Can you match the code to the correct description?

## Column B

H
Happy Face
S
P
Wearing A Party Hat
B
Wearing A Cap
EDDIE SAYS
How many matches did you find? Let's look at the letter H which comes up twice. What do both of these faces have in common? They are both happy! The first letter tells us if the face is happy or sad. H = happy S = sad Let's now look at the second letter of the code. Those with a P at the end are wearing party hats and B is the code for a cap. Can we turn these frowns upside down with our excellent code breaking?
• Question 10

Last question coming up!

Have a look at the shapes below, codebreaker.

Can you match the code to the correct description?

## Column B

G
5-sided shape
F
4-sided shape
B
3-sided shape
C
Two balls inside and one ball out...
P
One ball inside and two balls out...
EDDIE SAYS
Did you spot any matches? Let's start by looking at the letter G as it comes up more than once. Both of these shapes have five sides. This means that the first letter is code for the number of sides that the shape has. G = five sides F = four sides B = three sides Now, let's look at the second letters of the codes. The images with C on the end have two balls inside the main shape and one on the outside. The images with a P on the end have one ball inside the main shape and two balls on the outside. 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