Find the product of the numbers on the routes from A to B. Which route has the smallest product? Which the largest?
What is the largest 'ribbon square' you can make? And the smallest? How many different squares can you make altogether?
Can you find a cuboid that has a surface area of exactly 100 square units. Is there more than one? Can you find them all?
The illustration shows the graphs of fifteen functions. Two of them have equations $y=x^2$ and $y=-(x-4)^2$. Find the equations of all the other graphs.
If you move the tiles around, can you make squares with different coloured edges?
Each clue in this Sudoku is the product of the two numbers in adjacent cells.
The square of a positive number is twice as big as the cube of that number. What is the number?
