How many different triangles can you draw which each have one dot in the middle?
This challenge is a game for two players. Choose two of the numbers to multiply or divide, then mark your answer on the number line. Can you get four in a row?
Find the product of the numbers on the routes from A to B. Which route has the smallest product? Which the largest?
Can you see how these factor-multiple chains work? Find the chain which contains the smallest possible numbers. How about the largest possible numbers?
Using your knowledge of the properties of numbers, can you fill all the squares on the board?
Find the frequency distribution for ordinary English, and use it to help you crack the code.
How can you arrange the 5 cubes so that you need the smallest number of Brush Loads of paint to cover them? Try with other numbers of cubes as well.
The clues for this Sudoku are the product of the numbers in adjacent squares.
Use the interactivity to find all the different right-angled triangles you can make by just moving one corner of the starting triangle.
How many different ways can you find to join three equilateral triangles together? Can you convince us that you have found them all?
