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Chris and Matt at Staunton and Corse School told us:
You would need 81 digit cards made up of:They offered a good explanation for this. Beh Sze at Garden International School also explained carefully how he arrived at the answer:
0s - There can only be two zeros in each row because there is no 000 or 1000 in the song book.Well done too to James and Jasmine at Old Earth Primary School who also reasoned through their solution very clearly.