1. Arrange the digits from 1 to 9 in alphabetical order.
2. Memorise the large number you have created.
3. Close your eyes, can you remember it?
4. How many times can you halve this number (without a calculator) to give a whole number answer?
How did you use this starter? Can you suggest
how teachers could present or develop this resource? Do you have any comments? It is always useful to receive
feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.
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What are the prime factors of this large alphabetical number?
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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 an activity about recognising prime numbers.