# Home

The Maths Learning Centre (MLC) exists to help all coursework students at the University of Adelaide to engage with mathematics, so that it can support them to reach their goals and to enjoy learning.

If you would like to talk to a tutor about the maths in your course either **face-to-face or online**, then the best place to go is our Drop-In Centre.

If you would like to find more about our exam revision seminars for specific courses, then check out the revision seminars page.

## Inside the MLC

Our Maths Learning Centre exists to help all students at the University of Adelaide succeed in learning and using maths relating to their coursework.

#### Making your own sense

3

Oct

Complex lines with i-arrows again

Once upon a time (in 2016), I created a way to visualise where the complex points are in relation to the real plane, and then more recently (in 2022), I modified it to become the concept of i-arrows. I reread those blog posts recently while updating the blog to the new website, and I got all interested in them again. Here is what I’ve been working on over the last few weeks.

12

Aug

A recent video from Howie Hua showed how if you split a collection of numbers into equal-sized groups, then find the mean of each group, then find the mean of those means, it turns out this final answer is the same as the mean of the original collection. He was careful to say it usually does not work if the groups were different sizes. Which got me to wondering: just how much of an effect on the final mean-of-means can you have by splitting a collection of numbers into different-sized groups?