Christmas Tree Assembly

Difficulty:
foundation

Rating:
4-stars

GCSE Marks:
3-marks

GCSE Text:
An artificial Christmas Tree needs to be assembled layer by layer by attaching branches to a central column. There is a top piece which has no individual branches but is attached on the top of the column. This table shows the branches on each layer.

christmas-tree-layers

Each branch takes 30 seconds to attach and shape, and the top piece takes 4 minutes to attach and shape on its own. How long will it take to assemble the Christmas tree ready for decoration?

Suggestions:
Students enjoy this seasonal video, and it encourages them to link seconds to minutes, and to add up multiples of time. It works as a festive starter and normally takes a class 3-4 minutes to complete. It is often beneficial to discuss different approaches to the ’30 seconds each’ part of the problem. Extensions always work well too.

Extension Ideas:
Teachers could extend the learning by considering:

  • If the top piece requires 25 baubles to decorate it and each branch requires 3 baubles, how many baubles are needed to cover the┬átree?
  • It takes 75 minutes┬áto add lights and decorations. If the owner started at 4:00pm, at what time would the tree be finished?

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