Different Plates

You have two lego plates of different sizes. One is m studs wide and n studs long, and the other is p studs wide and q studs long. You start with the m by n plate flat on the table in front of you. How many different ways can you position the p by q plate on top of the first one, so it is connected by at least one stud?

Permutations Lego

Author: ehmatthes

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