It is not difficult to put a list of decimals in order of size. But what about ordering fractions?
John Farey introduced sequences of sequences of fractions in order of size, now called Farey sequences. Can you discover his method from the following examples?
Can you find the fifth Farey sequence? What about sixth Farey sequence and more sequences in this sequence of sequences?
What do you notice about these sequences?
Click here to download the FAREY SEQUENCES worksheet.
Click here to download the Notes for Teachers.
As follow up work see:
Mediant Madness https://nrich.maths.org/831
Ford Circles https://nrich.maths.org/6594
Farey Neighbours https://nrich.maths.org/6598