Thinking about Numbers
Many ways problem

Prime triangles
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Suggestion

Which triangular numbers are also prime?

Triangular numbers represented by dots in triangular arrays

How many ways can you find to justify your answer?

  • What do you find if you write out the first twelve triangular numbers?

  • Are there any patterns you notice?

Triangular numbers represented by dots have been sliced so that a section is moved to create a rectangle

What shape are we creating by moving the dots?

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Last updated 29-Nov-17
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