A Maths Starter of The Day

Which group of four numbers, arranged in a square, has the largest total?

  A B C D E F G H I J
1 90 20 23 5 53 57 65 99 3 98
2 29 41 79 5 97 32 71 55 15 63
3 34 26 17 63 13 1 33 63 100 99
4 98 22 30 4 60 8 51 3 23 86
5 38 6 77 53 7 66 59 10 91 59
6 14 84 70 38 96 96 41 52 71 83

Which group of four numbers, arranged in a square, has the smallest total?



Topics: Starter | Arithmetic | Mental Methods

  • Transum,
  • Without using pen and paper, completely relying on your mental abilities, how would you, as a teacher, work on this challenge? There are buttons below to change the range of numbers used in the grid. Does your strategy work for larger numbers too? This type of mental exercise builds abilities to cope with multi-step mathematical solutions required for more complex problems.

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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 related student activity called Discombobulated.


Student Activity

Curriculum Reference

See the National Curriculum page for links to related online activities and resources.


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