Most of the maths I did in school was maths for maths’ sake. Brain training, preparing for higher studies, etc. I’ve had very little use for it in everyday life. So when I do need it, it’s kind of gratifying. Today I used the properties of similar triangles to figure out sizing for my shawl. If I have 9 full pattern repeats after using 70% of the yarn, how many pattern repeats can I get if I use all of it? There is a red insert after every pattern repeat, and the last insert is a special one. Will the special one be the 9th, 10th, or 11th?