Originally calculators used seven small lights (or LEDs) to form the digits 0 to 9.
1. Which light is used most?
2. Which light is used least?
3. Which letters of the alphabet could be represented using this system?
4. How many different combinations of 'on' and 'off' can these seven lights make?
How did you use this starter? Can you suggest
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Here is an interactive version of a digital display. Click the lights to turn them on or off.
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Teacher, do your students have
access to computers?
Here a concise URL for a version of this page without the comments.
Here is the URL which will take them to a related student activity.