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Age range: 7-11
Duration: 30-59 mins
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  • Maths

Triangular numbers

This maths activity uses triangular numbers to calculate the number of gifts in the 12 days of Christmas.

Make maths fun with a hands-on activity to think about triangular numbers. In our festive resource, you can work out the number of gifts in the 12 days of Christmas and surprise everyone you know with the magic of maths! Join Wilf Wonders and his brother, Tom, as they walk you through how to do this activity at home or in school this Christmas.

Oh ho ho, and please do share your maths highlights with us @IETeducation! #SantaLovesSTEM

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How to calculate triangular numbers

Wonderful Wilf calculates the 12 days of Christmas presents using triangular numbers


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