Introduction to triangular numbers
Recommended for a high attaining set.\n\nThe first worksheet, 'long sums&' contains an introduction to triangular numbers.\n\nThe additional questions have many patterns that students can spot such as doubling all of the numbers above will give us the sequence 2 + 4 + ... and also if you add the numbers from 1 to 50 and take away the numbers from 1 to 13 you get the numbers 14 to 50.


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  • teacher explanation.docx
  • answers to all long sums qs.doc
  • Lesson Plan.doc
  • additional questions.pdf
  • long sums.pdf

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Created: Apr 1, 2013

Updated: Oct 15, 2015


docx, 32 KB

teacher explanation


doc, 11 KB

answers to all long sums qs

Lesson Plan

doc, 36 KB

Lesson Plan

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Creative Commons "Sharealike"

Creative Commons "Sharealike"