Find a cuboid (with edges of integer values) that has a surface area of exactly 100 square units.

Is there more than one?

Can you find them all?

Can you provide a convincing argument that you have found them all?

Click here for Notes for Teachers.

This problem is adapted from the NRICH task of the same name with permission of the University of Cambridge. All rights reserved. Click here for an NRICH poster for this activity.

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