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The challenges are problems of symmetry and geometry which typically can be solved by using a combination of rotations and repeat blocks.
 
The challenges are problems of symmetry and geometry which typically can be solved by using a combination of rotations and repeat blocks.
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<gallery>
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File:Argentina.png
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File:UnitedStates.png
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File:Thailand.png
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File:Australia.png
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File:Rwanda.png
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File:Peru.png
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</gallery>
    
== Reporting problems ==
 
== Reporting problems ==