This square is divided into 36 smaller squares. There are 91 squares in total. Because the big square has a side length of 6, there are six different square sizes ...

The number 9 can be written as a difference of two squares as 3 2 – 0 2 = 9 – 0 = 9. Can you find a different way to express it as the difference of two squares? Which numbers between 1 and 30 can be ...