@B
I've spent the last hour working numbers on my math tablet trying to figure what else you might have been doing. It is clear I am not ready to move on in math. Don't forget, if you go to bed at 10pm and can't play music until at least 6am that takes up 2912 hours a year right there! I think.
@Baba The unspoken piece of the Spotify number is that I use a tool to download material from Spotify to store locally. It "streams" the music to download it, but I'm not actively listening to it while it does that. So that often does happen while I'm asleep.
@B drats! Another theory bites the dust.
@Baba The joy of the challenge is the best. Unless you're an engineer, in which case correctness beats enjoyment.