You may also like

problem icon

Christmas Presents

We need to wrap up this cube-shaped present, remembering that we can have no overlaps. What shapes can you find to use?

problem icon

Face Painting

You want to make each of the 5 Platonic solids and colour the faces so that, in every case, no two faces which meet along an edge have the same colour.

problem icon

Let's Face It

In this problem you have to place four by four magic squares on the faces of a cube so that along each edge of the cube the numbers match.

Cubic Conundrum

Stage: 2 Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3

Correct solutions to the first part of the question were received from: Alastair H (Forres Academy), Andrei L (School 205, Bucharest). The solution below is based on Andrei's submission. Well done to both of you.

First I created a small cube from the net in the figure and observed the cubes from the problem:

Picture of cube

The first cube cannot be formed from that net, because the square marked with a red arrow should be in the position marked with a blue arrow:

Looking at the cube made from the net: It is possible to see that the second cube (horizontally) can be made from that net and also the last three

In conclusion, the 4 cubes denominated before are the same one, created from the net (B, D, E and F below).

The second part of the problem:

First shade the three faces of the view B of the cube which are not visible. Then do the same with the other three views of the same cube (D,E and F).

Cube A

A Cube BB Cube CC Cube DD Cube EE CUbe FF

You end up shading all the faces. This means that you can see all the faces of the cube in the four views B, D, E and F so there are no hidden faces where you can shade additional sections.