Addition and subtraction

Find your way through the grid starting at 2 and following these operations. What number do you end on?

This Sudoku, based on differences. Using the one clue number can you find the solution?

Can you solve this magic square?

How would you count the number of fingers in these pictures?

These two group activities use mathematical reasoning - one is numerical, one geometric.

Write the numbers up to 64 in an interesting way so that the shape they make at the end is interesting, different, more exciting ... than just a square.

In this section from a calendar, put a square box around the 1st, 2nd, 8th and 9th. Add all the pairs of numbers. What do you notice about the answers?

What do the digits in the number fifteen add up to? How many other numbers have digits with the same total but no zeros?

Look on the back of any modern book and you will find an ISBN code. Take this code and calculate this sum in the way shown. Can you see what the answers always have in common?