Each clue in this Sudoku is the product of the two numbers in adjacent cells.

These eleven shapes each stand for a different number. Can you use the multiplication sums to work out what they are?

Nine squares are fitted together to form a rectangle. Can you find its dimensions?

Can you make a tetrahedron whose faces all have the same perimeter?

We usually use squares to measure area, but what if we use triangles instead?

Isometric Areas explored areas of parallelograms in triangular units. Here we explore areas of triangles...

Can you find a general rule for finding the areas of equilateral triangles drawn on an isometric grid?

Can you find the areas of the trapezia in this sequence?