Challenge Level

Before doing this problem, it would be a good idea to look at Ring a Ring of Numbers.

Change the ring so that there are only three squares.

Can you place three different numbers in them so that their differences are odd?

Can you make the differences even?

What do you notice about the sum of each pair in each case?

Try with different numbers of squares around the ring.

What happens with 5 squares? 6 squares?

What do you notice?