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C3 Jan 2012 Edexcel - Post exam discussion - Solutions and paper in first post

Reasonable paper I thought

Boundaries

Jan C3 boundaries have been fairly consistent in recent years; 61, 59, 60

I would say Jan 11 (61) was the most challenging of the 3.

I think Jan 12 was significantly easier than Jan 11, so I can only think that the boundaries will increase


My best guess is....


75 = 100UMS
69 = 90UMS
63 = 80UMS
57 = 70UMS
50 = 60UMS
43 = 50 UMS
36 = 40UMS
(edited 12 years ago)
12 Jan C3 Model.pdf942.0KB

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Reply 1
Avatar for CMPUNK
CMPUNK
2
thanks :smile:
Reply 2
Avatar for kanasaki
kanasaki
thanks arsey :biggrin:
what you think the grade boundary will be?
Reply 3
Avatar for CMPUNK
CMPUNK
2
for q1 if i forgot to simplify how many marks would i lose
Reply 4
Avatar for dude345
dude345
Will I lose a mark for leaving my answer as 28 minutes (to the nearest minute)
Reply 5
Avatar for ahmedgul
ahmedgul
thanks
Reply 6
Avatar for Beckiix
Beckiix
I think I got a high B or a low A ><
Reply 7
Avatar for Schteve
Schteve
2
Got time = 27.7 for the one question but didn't add it on to midday :/ grrr.
Reply 8
Avatar for kanasaki
kanasaki
oh yeah 1 mark off
domain of f^-1(x) :frown:

74/75 done :biggrin:
If I put 2 extra solutions for question 5, am I likely to be marked down?
Reply 10
Avatar for maths134
maths134
13
Thank you! 75/75 if 28 minutes past midday is allowed lol.
75/75 reemo
What's your guestimates for grade boundaries?

Made a stupid mistake on the second differntiation question and a couple of others :facepalm2:
Reply 13
Avatar for Schteve
Schteve
2
Original post by annagoesbroom
If I put 2 extra solutions for question 5, am I likely to be marked down?


Think so
Concurred with the model answers on all questions, guessing a slightly above average grade boundary since a couple were trickier than usual.
Reply 15
Avatar for Camss
Camss
7
Arsey - do you think there will be any mark lost for putting that t= 28 minutes to the nearest minute instead of 12:28 as an actual 24h time? Otherwise full marks!
Reply 16
Avatar for thomas93
thomas93
74... Damn, 12.28, what a cursed time!
Reply 17
Avatar for battsa
battsa
For the normal to the curve, i got the correct x coordinate, the right dy/dx in terms of y but somehow worked the gradient out as -1/2 not -8. After that i made an equation using that gradient. How many marks will i have lost?

Got everything else right except the domain, i didn't know what was going on :P
Reply 18
Avatar for S.Pink
S.Pink
Thanks Arsey :smile: Just confirmed my suspicions that I mess up Q8 but very very surprised but happy to find out that I got that 10 marker right :biggrin: Few silly mistakes... time in minutes thing... but other than that alright.
Grade boundary predictions would me greatly appreciated if possible!
Reply 19
Avatar for oHellno
oHellno
12
Not too bad :smile:

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