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# More Numbers in the Ring

##### This problem is based on an idea taken from "Apex Maths Pupils' Book 2" by Ann Montague-Smith and Paul Harrison, published in 2003 by Cambridge University Press.

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Age 5 to 7

Challenge Level

*More Numbers in the Ring printable sheet*

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?

Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths. How many different triangles can they make?