The solution provided lower down the page includes an elegant algebraic way of solving this problem but did your pupils come up with a different method? Please let us know. There are also extension questions available by clicking the button below.

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Did you know that the giraffe is the tallest land animal and the tallest living mammal? The tallest male giraffe on record was 5.88 metres tall. Despite its long neck, the giraffe has only seven vertebrae, exactly the same number as most other mammals.

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Teacher, do your students have
access to computers? Do they have iPads or Laptops in Lessons?

Whether your students each have a TabletPC, a Surface or a Mac,
this activity lends itself to eLearning (Engaged Learning).

Here a concise URL for a version of this page without the comments.