Watch the video of Fran re-ordering these number cards. What do you notice? Try it for yourself. What happens?
What do you notice about these squares of numbers? What is the same? What is different?
Try out this number trick. What happens with different starting numbers? What do you notice?
Does this 'trick' for calculating multiples of 11 always work? Why or why not?
Take a look at the video of this trick. Can you perform it yourself? Why is this maths and not magic?
The Number Jumbler can always work out your chosen symbol. Can you work out how?
Think of a number and follow the machine's instructions... I know what your number is! Can you explain how I know?
I added together some of my neighbours house numbers. Can you explain the patterns I noticed?