More building with cubes
Here are more buildings to picture in your mind's eye. Watch out -
they become quite complicated!
Age
7 to 11
Challenge level
Problem
Before you try this problem, you may like to have a go at Building with Cubes .
A. Imagine you have seven cubes. They are green, white, brown, pink, yellow, blue, and red:
Image
Now, try to picture making this building in your head:
Start with the blue and yellow cubes. Put them next to each other.
The blue cube is on the left. It is underneath a pink cube. Put the red cube just behind the yellow cube.
Put the green cube on top of the red cube.
Put the brown cube on the right of the yellow cube.
Put the white cube in front of the pink cube.
What does your building look like?
Try using cubes to check whether you had pictured it correctly.
B. Now imagine making a building with these eight cubes:
Image
Start with three cubes in a row.
The centre cube is pink.
The blue cube is on the right of the pink cube.
The orange cube is on the left of the pink cube.
The blue cube is also underneath a yellow cube.
Put the black cube behind the orange
cube.
Put the brown cube on top of the green cube and put them both
behind the black cube.Finally, put the white cube on top of the orange cube.
What does your building look like?
Try using cubes to check whether you had
pictured it correctly.
C. Now try imagining a building with these ten cubes:
Image
Start with three cubes in a column.
The bottom cube is brown and the centre cube is blue.
The cube at the top is black.
Put the yellow cube underneath the red cube and put them both on the left hand side of the column of three cubes.
Rotate all five cubes a quarter turn anti-clockwise, keeping the columns pointing upwards.
Now put the dark green cube on the right of the yellow cube.
Put the white cube on the left of the brown cube and the pink cube on the left of the blue cube.
Put the light green cube on top of the black cube.
Rotate the whole building of nine cubes another quarter turn anti-clockwise (again keeping the columns vertical).
Finally, put the orange cube in front of the white cube.
What does your building look like?
Once again, try using cubes to check whether you had pictured it correctly.
We would love to receive pictures or photographs of your buildings.
Getting Started
You might like to sketch each stage as you picture the building in
your head.
Student Solutions
Abbie, Kyle and Sophie from Lillington Primary School sent us pictures of building A. Here is Abbie's:
Image
This is Kyle's:
Image
And this is Sophie's image which is drawn from a slightly different perspective:
Image
Alice from the Royal School sent us a picture of building B, which she drew on isometric paper (a very good idea!):
Image
Thank you, Alice.
Pupils at Lillington Primary School also tried building C. Here is Abbie's picture:
Image
Jerrold drew it from a different perspective. Which cube can't you see? Where would it be?
Image
Thank you, too, to Nisar, Dereece, Kyle and Sophie who all sent in pictures of building C from different angles. You must have worked hard on this activity!
Teachers' Resources
More Building with Cubes
Before you try this problem, you may like to have a go at Building with Cubes .
A. Imagine you have seven cubes. They are green, white, brown, pink, yellow, blue, and red:
Image
Now, try to picture making this building in your head:
Start with the blue and yellow cubes. Put them next to each other.
The blue cube is on the left. It is underneath a pink cube. Put the red cube just behind the yellow cube.
Put the green cube on top of the red cube.
Put the brown cube on the right of the yellow cube.
Put the white cube in front of the pink cube.
What does your building look like?
Try using cubes to check whether you had pictured it correctly.
B. Now imagine making a building with these eight cubes:
Image
Start with three cubes in a row.
The centre cube is pink.
The blue cube is on the right of the pink cube.
The orange cube is on the left of the pink cube.
The blue cube is also underneath a yellow cube.
Put the black cube behind the orange cube.
Put the brown cube on top of the green cube and put them both behind the black cube.Finally, put the white cube on top of the orange cube.
What does your building look like?
Try using cubes to check whether you had pictured it correctly.
C. Now try imagining a building with these ten cubes:
Image
Start with three cubes in a column.
The bottom cube is brown and the centre cube is blue.
The cube at the top is black.
Put the yellow cube underneath the red cube and put them both on the left hand side of the column of three cubes.
Rotate all five cubes a quarter turn anti-clockwise, keeping the columns pointing upwards.
Now put the dark green cube on the right of the yellow cube.
Put the white cube on the left of the brown cube and the pink cube on the left of the blue cube.
Put the light green cube on top of the black cube.
Rotate the whole building of nine cubes another quarter turn anti-clockwise (again keeping the columns vertical).
Finally, put the orange cube in front of the white cube.
What does your building look like?
Once again, try using cubes to check whether you had pictured it correctly.
We would love to receive pictures or photographs of your buildings.
Why do this problem?
This problem leads on from Building with Cubes by introducing larger numbers of cubes so that there is more information to be kept in your mind's 'eye' at one time. Being able to visualise is a useful skill which learners are often not used to drawing on. By explicitly talking about
visualisation, and offering opportunities like this for your class to practise visualising, you will be encouraging them to use this skill in their independent problem solving.
This activity might also be a good context in which to introduce isometric paper to your class. Recording on this paper is a skill in itself, but it is extremely useful for drawing 3D images of cubes.
It would be a good idea for the class to try Building with Cubes before they tackle this problem, including having a go at the introductory activities described in that problem's notes.
Key questions
Can you see those two cubes in your head?
What about the third one?
If it is under/behind/ on the right of that one, where will it be?
As you picture each stage in your head, can you to draw it so that you can keep track of where the cubes are?
Tell me about the building in your head.