In France, it is common to refer to “kilometres per hour” as “kilomètre-heures”. This fills me with a deep sense of mathematical unease.

So I started thinking about what a “kilometre hour” actually is. And also about turtles.

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In France, it is common to refer to “kilometres per hour” as “kilomètre-heures”. This fills me with a deep sense of mathematical unease.

So I started thinking about what a “kilometre hour” actually is. And also about turtles.

The solution to Puzzle #4 is now up. Either follow the links from the puzzle itself **HERE**, or, if you have seen the question already, click **HERE** to go straight to the solution.

As I mentioned previously, I think this is a good puzzle for mathematics learners at GCSE level or for those setting out on A-level courses, both for checking up on basic algebraic understanding and for illustrating some specific problem-solving skills. I have summarised the key learning points that I think the puzzle raises on the solution page.

Any suggestions? Need to put brackets in to this true. Pls help! @mathsjem @solvemymaths @hegartymaths pic.twitter.com/LOdAAYOYqE

— Japleen Kaur (@japleen_kaur1) May 14, 2015

Any ideas…? Continue reading