Working systematically

Bellringers have a special way to write down the patterns they ring. Learn about these patterns and draw some of your own.

Using different numbers of sticks, how many different triangles are you able to make? Can you make any rules about the numbers of sticks that make the most triangles?

Use the clues about the symmetrical properties of these letters to place them on the grid.

In this addition each letter stands for a different digit, with S standing for 3. What is the value of YxO?

A Sudoku with clues given as sums of entries.

How many different flags can you make?

Can you work out the values of the digits in this addition sum?

How many ways are there to make 11p using 1p, 2p and 5p coins?

How many different shapes can you make by putting four right- angled isosceles triangles together?

Solve this Sudoku puzzle whose clues are in the form of sums of the numbers which should appear in diagonal opposite cells.