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Cassandra, David and Lachlan are brothers and sisters. They range in age between 1 year and 14 years. Can you figure out their exact ages from the clues?

Domino Square

Use the 'double-3 down' dominoes to make a square so that each side has eight dots.

4 Dom

Use these four dominoes to make a square that has the same number of dots on each side.

Gift Stacks

Age 7 to 11 Challenge Level:

Why do this problem?

This problem encourages learners to apply their knowledge of number operations using trial and improvement. It could also be used to introduce algebraic notation to older children.

Key questions

What could you try to start with?
Have you checked it fits all the information?
What could we try next?

Possible support

Using blocks or counters to represent gifts will help pupils to try out their ideas.