We count in base ten because most of us have ten fingers. But what if we only had seven or eight? Here's a chance for you to explore the properties of base 10 as well as some less familiar number bases.
How many different lengths is it possible to measure with a set of three rods? Explore this problem, and make some discoveries about number bases.
Think of a two digit number, reverse the digits, and add the numbers together. Something special happens... Watch the videos and adapt the method to explain a variety of number tricks.
Imagine you had a set of positive and negative "weights", which can be combined to make different totals. Which totals can you make?
Watch the video to see how Charlie and Becky make rectangles with squares, sticks and units. Then have a go at making some rectangles of your own...