Arrange the ornaments in the box so that no more than
three are in any line horizontally, vertically or diagonally.
Teacher: There are also selfchecking versions of this activity for different sized grids:
2 by 2
3 by 3
4 by 4
5 by 5
Topics: Starter  Puzzles  Xmas
You can find many more ChristMaths activities at:
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Previous Day  This starter is for 11 December  Next Day
There is a printable worksheet to go with this activity.
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access to computers? 

Here a concise URL for a version of this page without the comments.
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Here is the URL which will take them to a related 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