Tarsia puzzle – Equivalent fractions for KS2 maths

What's included?

Two-page PDF featuring 18 sets of equivalent fractions, plus solutions

Key Stage



Years 5-6


This tarsia puzzle for KS2 comprises 18 sets of equivalent fractions spread over 16 equilateral triangles. These go together to make one large equilateral triangle. We’ve included the solution in this download.

What is a tarsia puzzle?

It’s a type of educational puzzle often used in mathematics classrooms to reinforce concepts through problem-solving and critical thinking.

The puzzle consists of a set of polygons, triangles in this case, which you can rearrange to form a larger shape or grid.

How to solve it

To solve this puzzle, students must carefully consider the maths content of each piece and how they fit together, ensuring that the solutions align correctly when they assemble it.

Thomas Pitts is a teacher and primary maths mastery specialist. Find him at, get more of his resources at his TES shop, and follow him on Twitter at @ThomasJPitts.

Tarsia puzzle
Tarsia puzzle – Equivalent fractions for KS2 maths

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