List

Construction

Folded A4
problem

Folded A4

Age
11 to 14
Challenge level
filled star empty star empty star
What shapes can be made by folding an A4 sheet of paper only once?
Either Side
problem

Either Side

Age
14 to 16
Challenge level
filled star filled star empty star
A disc with a pencil inside it is rolled around the outside and inside of a wire equilateral triangle. What shape is drawn by the pencil?
Pink and White
problem

Pink and White

Age
14 to 16
Challenge level
filled star filled star empty star
The white square slides once around the pink square. Through what distance does the point P on the white square move?
Defined Distances
problem

Defined Distances

Age
11 to 14
Challenge level
filled star filled star empty star
Mark writes four points on a line at different lengths. What is the distance between the two points furthest apart?
Contact Circles
problem

Contact Circles

Age
14 to 16
Challenge level
filled star empty star empty star
These four touching circles have another circle hiding amongst them...
Constructing Triangles
problem
Favourite

Constructing Triangles

Age
11 to 14
Challenge level
filled star empty star empty star
Generate three random numbers to determine the side lengths of a triangle. What triangles can you draw?
Snail's Pace
problem

Snail's Pace

Age
14 to 16
Challenge level
filled star filled star empty star
A snail is at the corner of a cube. What proportion of the cube's surface can the snail reach within an hour?
Triangular Wheel
problem

Triangular Wheel

Age
14 to 16
Challenge level
filled star filled star empty star
An equilateral triangle is rolled along a line. What is the length of the path traced out by one of its vertices?
3-sided
problem

3-sided

Age
14 to 16
Challenge level
filled star filled star empty star
How many triangles can Jack draw with two sides of lengths $6$cm and $8$cm and an area of $7$cm$^2$?
The Farmers' Field Boundary
problem
Favourite

The Farmers' Field Boundary

Age
11 to 14
Challenge level
filled star filled star empty star
The farmers want to redraw their field boundary but keep the area the same. Can you advise them?