These squares have been made from Cuisenaire rods. Can you describe
the pattern? What would the next square look like?
Cut differently-sized square corners from a square piece of paper
to make boxes without lids. Do they all have the same volume?
Find another number that is one short of a square number and when
you double it and add 1, the result is also a square number.
Charlie's house number is a three-digit square number.
This number when reversed is also a square and is Charlie's telephone extension at work.
His car registration number is a four-digit square number and is formed from his house number by repeating the right hand digit.
What is Charlie's house number?