United Kingdom, UK

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Picturing Square Numbers Jiaqi Zhen
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Quadratic Patterns James
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Holes Intisar
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Picturing Square Numbers Arjun
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Picturing Square Numbers Oliver
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A Very Shiny Nose Otto
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Frosty the Snowman Nina
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Amicable Arrangements Serxhio
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Keep It Simple William
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Keep It Simple Toby Benedict and William