90, 101, 54, 99, 45, 54, 18, 18, 27, 99, 36, 27, 90, 63, 63, 90, 63, 99, 99, 99, 90, 81, 81, 81, 90, 54, 72, 72, 27, 90, 99, 45, 72, 99, 72, 27, 63, 99, 36, 81, 99, 45, 81, 54, 45, 81, 18, 45, 27, 90.
Which number is the odd one out? Write down as many reasons as you can think of explaining why that number is the odd one out.
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.
Click here to enter your comments.
Note to teacher: Doing this activity once with a class helps students develop strategies. It is only when they do this activity a second time that they will have the opportunity to practise those strategies. That is when the learning is consolidated. Click the button above to regenerate another version of this starter with different numbers.
Your access to the majority of the Transum resources continues to be free but you can help support the continued growth of the website by doing your Amazon shopping using the links on this page. Below is an Amazon search box and some items I have chosen and recommend to get you started. As an Amazon Associate I earn a small amount from qualifying purchases which helps pay for the upkeep of this website.
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.