Experiment of December 7, 2016:

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Solution video:

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What is the minimum number of mugs and knives that Mother Christmas needs in order to build a stable, self-supporting connection between the mugs using the knives?

A) Two knives, and two mugs.

B) Three knives, and three mugs.

C) Four knives, and three mugs.

D) Four knives, and four mugs.