Look at what happens when you take a number, square it and subtract your answer. What kind of number do you get? Can you prove it?
What happens when you add three numbers together? Will your answer be odd or even? How do you know?
This problem looks at how one example of your choice can show something about the general structure of multiplication.
This investigates one particular property of number by looking closely at an example of adding two odd numbers together.
Shapes are added to other shapes. Can you see what is happening? What is the rule?
Here's a very elementary code that requires young children to read a table, and look for similarities and differences.
Looking at the Olympic Medal table, can you see how the data is organised? Could the results be presented differently to give another nation the top place?
