What do you notice about these families of recurring decimals?
What's special about the area of quadrilaterals drawn in a square?
48 is called an abundant number because it is less than the sum of its factors (without itself). Can you find some more abundant numbers?
Place the numbers from 1 to 9 in the squares below so that the difference between joined squares is odd. How many different ways can you do this?
Some children were playing a game. Make a graph or picture to show how many ladybirds each child had.
How many different triangles can you make on a circular pegboard that has nine pegs?
In the café, your ice cream selection can't include a combination that someone else has chosen. What could these seven children have chosen?
If you think that mathematical proof is really clearcut and universal then you should read this article.
A serious but easily readable discussion of proof in mathematics with some amusing stories and some interesting examples.
