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Table Height

Stage: 3 Short Challenge Level: Challenge Level:2 Challenge Level:2

84cm represents:
the height of the table minus the long side of a block plus the short side of a block.
96cm represents:
the height of the table plus the longside of a block minus the short side of a block.

So 84cm + 96cm represents two heights of the table.
The height of the table is therefore 90cm.

This problem is taken from the UKMT Mathematical Challenges.
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