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Starfish Spotting

How many starfish could there be on the beach, and how many children, if I can see 28 arms?

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Catrina's Cards

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Birthday Sharing

Age 5 to 7 Challenge Level:
Rowan from St Andrews tried this at home and the adult with him sent in pictures of his work.  The adult wrote out Rowan's explanations in green:

   

Well done Rowan - you have explained your reasoning very clearly.

You may be able to find other ways of getting to an answer.