No Partner

12, 58, 27, 17, 9, 38, 44,
14, 6, 2, 50, 10, 54, 20,
55, 37, 36, 26, 51, 47, 13.

Most of the numbers in the list above can be added to another number in the list to give a sum of 64. Which numbers do not have a partner?

A Mathematics Lesson Starter Of The Day

Topics: Starter | Arithmetic | Mental Methods | Number

  • Transum,
  • A quick starter based on a simple mathematical process but good to get students engaged at the beginning of the lesson. Don't forget you can refresh this page to get another version of this starter. You could even use this starter for every Maths lesson in a week to see if strategies are developed and speed increases!
  • Priyanshi.solanki, Darcy Road Public School
  • I love the transum games, the starter of the day and all the fun stuff.
  • Nischal, Emmanuel Catholic College
  • This was a very fun starter.

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.

Previous Day | This starter is for 30 August | Next Day



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 from random numbers.

Note that you can click on a number to partially hide it. Click it again to show it. This is useful to eliminate all of the pairs to leave only the numbers with no partner showing. The pupil version of this activity is even more interactive. The link is lower down this page.

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Laptops In Lessons

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.

Laptops In Lessons

Here is the URL which will take them to a student version of this activity.

Student Activity



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