A special clock for American Independence Day. It only uses the digit 4.
Can you design a special clock for a different day of the year using a different digit?
Topics: Starter | Arithmetic | Investigations | Problem Solving
This evening, I was at a parents’ evening @NDHSSheffield and this clock was on the wall in one of the maths rooms! #CoolMaths pic.twitter.com/05mSlRVBLF— Mrs Grant (@MrsGrant_BATL) March 9, 2018
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There are of course many ways pupils might respond to this challenge but here is an example of a solution
This type of challenge has been around for a long time. The first known reference is in a book called "The Schoolmasters Assistant: Being a Compendium of Arithmetic, Both Practical and Theoretical". It was written in 1762 by Thomas Dilworth, an English cleric. Here is the wording as it appeared in the book:
$$33+\frac33 = 34$$
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Teacher, do your students have access to computers such as tablets, iPads or Laptops? This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments:
However it would be better to assign one of the student interactive activities below.
Here is the URL which will take them to a related student activity.
Here is the link to the pairs game based on American-English and British-English mathematical words.
Here is a visual aid for teachers to use when teaching alalogue time.