Holly Holly Holly Holly Holly Holly Holly

Christmas Ornaments

Arrange the ornaments in the box so that no more than
three are in any line horizontally, vertically or diagonally.

Teacher: There are also self-checking versions of this activity for different sized grids:
2 by 2 3 by 3 4 by 4 5 by 5

A Christmas Mathematics Lesson Starter Of The Day


Topics: Starter | Puzzles | Xmas

You can find many more ChristMaths activities at:

Transum.org/ChristMaths/

ChristMaths

  • Rachael, Kirsty and Ewan, Leswalt Primary
  •  
  • We really enjoyed doing this.
  • Katie Lumsdaine F2 High School Of Dundee, High School Of Dundee
  •  
  • It was challenging but fun and we could use this method to decorate our Christmas tree! :).
  • Transum,
  •  
  • After solving the problem for the 4 by 4 grid (not forgetting to check the diagonals) investigate how many different solutions there are. Extend to a 5 by 5 grid and then consider how many ornaments could be arranged on an n by n grid if each column, row and diagonal must contain one empty space.
  • Mr Shepherd, St Lawrence Academy, Scunthorpe
  •  
  • 7set4 and 9set4 really enjoyed this, given a minute each and a default fail as soon as a line was completed. We managed to get 14 pupils involved in a 10 minute slot. Exetending to how many possible solutions was beyond them though.

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 11 December | Next Day

 

Answers

Sign in to your Transum subscription account to see the answers

There is a printable worksheet to go with this activity.

Worksheet

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 link. As an Amazon Associate I earn a small amount from qualifying purchases which helps pay for the upkeep of this website.

Educational Technology on Amazon

 

Online Maths Shop

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:

Transum.org/go/?Start=December11

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 the student version of this activity.

Transum.org/go/?to=xmas

Student Activity

OR

Investigate other sized ornament boxes using a spreadsheet.

Use "1" to represent an ornament in the box.

Set up row and column totals to check whether your solution is correct


Transum Shop ::  Laptops aid Learning ::  School Books ::  Tablets ::  Educational Toys ::  STEM Books

Apple

©1997-2022 WWW.TRANSUM.ORG