BACK TO WORKSHEETSTriangle numbers are formed by building triangle patterns as follows:
You can draw these shapes or use addition to continue the sequence.
You should learn at least the first few triangle numbers....
1, 3, 6, 10, 15, 21, 28 .....
In this worksheet, students recognise the sequence of triangles and add in missing numbers.
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Key stage: KS 2
Year: Year 3 11+ worksheets
Curriculum topic: Maths and Numerical Reasoning
Curriculum subtopic: Sequences
Difficulty level: 
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