# Your Solutions - Stage 3 & 4

### Multiples Sudoku

##### Stage: 3 Challenge Level:

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

### Shape Products

##### Stage: 3 Challenge Level:

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

### Number Families

##### Stage: 3 Challenge Level:

How many different number families can you find?

### Alison's Quilt

##### Stage: 3 Challenge Level:

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

### Building Tetrahedra

##### Stage: 4 Challenge Level:

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

### Isometric Areas

##### Stage: 3 Challenge Level:

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

### More Isometric Areas

##### Stage: 3 Challenge Level:

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

### Of All the Areas

##### Stage: 4 Challenge Level:

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

### Towering Trapeziums

##### Stage: 4 Challenge Level:

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