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Dandy candies

Act 1

An animation shows candies being packaged in the shape of a cuboid. Four different arrangements are shown. In addition, the package is tied with a ribbon. What is the cheapest way to package up these candies?

Act 2

Further information is given in the form of a picture showing the four packages.

Act 3

A picture reveals the answer. There is also a table showing different arrangements and giving the amount of card and ribbon needed.

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