I think I will create two types of thread a pre-exam and post exam thread.
Pre-exam threads understandably need to be locked, but it seem to take ages for them to be unlocked.
Here are my model answers, written on the paper. I thought it was a hard paper in comparison to previous ones.
How did you find it?
Q1. Fairly standard calculus question. (6m)
Q2. Pretty easy Surds (6m)
Q3. Easy inequalities (6m)
Q4. Standard iteration sequences (6m)
Q5. a) unusual qu will cause probs (4m)
Q5. b) standard sketching (4m)
Q6. Coordinate geometry, not easy but fairly standard (7m)
Q7. Easy standard calculus question (5m)
Q8. Fairly tricky sketching / transforming question. First 5 marks were easy though. (10m)
Q9. Quite an odd AP question, lots of errors will be made on this qu (9m)
Q10. Calculus/Coordinate geometry again, this one will cause many probs too (11m)
So I do think it was a harder than normal paper but not stupidly hard. The first 24 marks should be bankers, I would say there were 40-45 pretty easy marks. So I would not expect very low boundaries.
Guessing boundaries is far from easy; Jan C1 boundaries are typically higher than those in June. More entries in June, more students retaking... only once has the boundary for an A dipped below 60 for an A in the past C1 Jan papers.
C1 Jan 11 was definitely easier and that was 62 for an A.
I am going to go for
100UMS = 73
90UMS = 66
80UMS = 59
70UMS = 52
60UMS = 45
50UMS = 38
40UMS = 31