It's C1 day (and C2 for many)! I hope it's gone well if you were sitting it today. Anything that bothered you about the paper?
It's your chance to pick my brain about whatever's on your mind about maths. Got a question you've been struggling with? Got a topic you just can't get your head around? Found a great maths resource I might not have seen? Pop it in the comments and I'll get back to you as quickly as I can.
Meanwhile, here are my top links of the week: