Almost my whole class are Macbook users, and from what i've seen most of them use Pages for notes and Keynote for presentations. Its often a problem where someone forgot/doesnt know how to convert a .keynote to a .pptx so the file doesnt work on the PC hooked up to the projector.I've never seen a single person ever use Number or Pages in my 20 years of Mac Support. Only Keynote. I'm actually surprised that they haven't dropped Pages/Numbers yet and just added support for Google docs/office to Keynote.
Numbers though I've never seen anyone use ever. Unlike the other 2, it seriously lags behind its competitors. Google Sheets is quite popular because of how easy it is to collaborate with others on it. We use it all the time as a sign-up sheet for exams and classes.