CCEA C2 2019 Answers Thread Watch

michaeljohnsmith
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This is what I can remember, think the order of some questions might be wrong though. Feel free to drop any missing answers/ammendments!

1. Trapezium rule - 0.357
2. Arithmetic one? a = £6.10, d = £0.70
3. Circle - Proof and area = 11.1 cm^2
4. Geometric - Sum to infinity = 72.5
5. Area between y and curve - 4.5 unit^2
6. Log proof and equation - x=3, x=4
7. Can't remember question
8. Length of one side - 308mm (unsure about this one)

EDIT
Seems the order of these is completely off but I'll list the rest of what I can remember by topic:

Binomial - cannot for the life of me remember the expansion, term independent of x = 46/9
Circles: a. Centre = (3,-1) or (-3,1) cant remember which, radius = 2
b. Equation of circle: (x-1)^2 + (y+2)^2 = 40 (I think, again the signs might be the wrong way round)
Last edited by michaeljohnsmith; 1 month ago
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JDudd161
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(Original post by michaeljohnsmith)
This is what I can remember, think the order of some questions might be wrong though. Feel free to drop any missing answers/ammendments!

1. Trapezium rule - 0.357
2. Arithmetic one? a = £6.10, d = £0.70
3. Circle - Proof and area = 11.1 cm^2
4. Geometric - Sum to infinity = 72.5
5. Area between y and curve - 4.5 unit^2
6. Log proof and equation - x=3, x=4
7. Can't remember question
8. Length of one side - 308mm (think there was another part to this one before this)
What did you get for the term independent of the x? And for question 2 I said just 6.1 and 0.7, will that be ok?
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michaeljohnsmith
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term independent of x i got 46/9 and I'd say so, I just left my answers in that form because the question talked about money
(Original post by JDudd161)
What did you get for the term independent of the x? And for question 2 I said just 6.1 and 0.7, will that be ok?
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JDudd161
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(Original post by michaeljohnsmith)
term independent of x i got 46/9 and I'd say so, I just left my answers in that form because the question talked about money
Got that too, happy days. And btw I used the angle of the equilateral as 60 degrees the whole way through the question instead of 30 degrees, do you reckon I’ll lose a lot of marks despite the method being right? It’s just that one question that I’m bricking myself over
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michaeljohnsmith
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(Original post by JDudd161)
Got that too, happy days. And btw I used the angle of the equilateral as 60 degrees the whole way through the question instead of 30 degrees, do you reckon I’ll lose a lot of marks despite the method being right? It’s just that one question that I’m bricking myself over
What do you mean exactly?
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JDudd161
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So, my method was initially looking at a corner of the triangle and noticing that the edges are tangents to the snooker balls, and the two tangents formed a kite with the radius, so the line from where the tangents met (the corner) to the centre of the snooker ball bisected the 60 degree angle to form a right angled triangle with angle of 30 degrees. I noticed all that but I was an idiot and worked with a triangle that had 60 degrees
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michaeljohnsmith
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(Original post by JDudd161)
So, my method was initially looking at a corner of the triangle and noticing that the edges are tangents to the snooker balls, and the two tangents formed a kite with the radius, so the line from where the tangents met (the corner) to the centre of the snooker ball bisected the 60 degree angle to form a right angled triangle with angle of 30 degrees. I noticed all that but I was an idiot and worked with a triangle that had 60 degrees
Ah yeah I get you now, I did your method using 30 degrees and worked out the extra length and added it on to the 5 diameters of the balls.
Honestly, it's hard to say. I think youll get a few marks knoocked off but I'd assume there's a few marks for spotting the relationship between the circle and the triangle as it's the key to the question so probably 2/5 since the rest of the working depends on the correct substitution.
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JDudd161
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That’s what I was hoping, but still so bloody annoyed at myself. Anyway, what other modules are you doing?
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michaeljohnsmith
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c3, c4 and already sat s1
(Original post by JDudd161)
That’s what I was hoping, but still so bloody annoyed at myself. Anyway, what other modules are you doing?
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antonio16007
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What do we think the grade boundaries will be like for this and c1
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michaeljohnsmith
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Didn't sit C1 this yr, did it last yr so can't say. As for C2, I'd say they'd be fairly high considering its only resits this year and it wasn't an overly challenging paper. Maybe mid to high 50s /75 for an A?
(Original post by antonio16007)
What do we think the grade boundaries will be like for this and c1
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michaeljohnsmith
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What did you get for the last question?
(Original post by antonio16007)
What do we think the grade boundaries will be like for this and c1
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antonio16007
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Had no idea how to do it lol
(Original post by michaeljohnsmith)
What did you get for the last question?
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nistudent50
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(Original post by michaeljohnsmith)This is what I can remember, think the order of some questions might be wrong though. Feel free to drop any missing answers/ammendments!

1. Trapezium rule - 0.357
2. Arithmetic one? a = £6.10, d = £0.70
3. Circle - Proof and area = 11.1 cm^2
4. Geometric - Sum to infinity = 72.5
5. Area between y and curve - 4.5 unit^2
6. Log proof and equation - x=3, x=4
7. Can't remember question
8. Length of one side - 308mm (unsure about this one)

EDIT
Seems the order of these is completely off but I'll list the rest of what I can remember by topic:

Binomial - cannot for the life of me remember the expansion, term independent of x = 46/9
Circles: a. Centre = (3,-1) or (-3,1) cant remember which, radius = 2
b. Equation of circle: (x-1)^2 + (y+2)^2 = 40 (I think, again the signs might be the wrong way round)

for
(Original post by michaeljohnsmith)
This is what I can remember, think the order of some questions might be wrong though. Feel free to drop any missing answers/ammendments!

1. Trapezium rule - 0.357
2. Arithmetic one? a = £6.10, d = £0.70
3. Circle - Proof and area = 11.1 cm^2
4. Geometric - Sum to infinity = 72.5
5. Area between y and curve - 4.5 unit^2
6. Log proof and equation - x=3, x=4
7. Can't remember question
8. Length of one side - 308mm (unsure about this one)

EDIT
Seems the order of these is completely off but I'll list the rest of what I can remember by topic:

Binomial - cannot for the life of me remember the expansion, term independent of x = 46/9
Circles: a. Centre = (3,-1) or (-3,1) cant remember which, radius = 2
b. Equation of circle: (x-1)^2 + (y+2)^2 = 40 (I think, again the signs might be the wrong way round)
For the trapezium rule question I didn’t use radian mode on the calculator, do you think they would take much marks off that?
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michaeljohnsmith
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(Original post by nistudent50)
(Original post by michaeljohnsmith)This is what I can remember, think the order of some questions might be wrong though. Feel free to drop any missing answers/ammendments!

1. Trapezium rule - 0.357
2. Arithmetic one? a = £6.10, d = £0.70
3. Circle - Proof and area = 11.1 cm^2
4. Geometric - Sum to infinity = 72.5
5. Area between y and curve - 4.5 unit^2
6. Log proof and equation - x=3, x=4
7. Can't remember question
8. Length of one side - 308mm (unsure about this one)

EDIT
Seems the order of these is completely off but I'll list the rest of what I can remember by topic:

Binomial - cannot for the life of me remember the expansion, term independent of x = 46/9
Circles: a. Centre = (3,-1) or (-3,1) cant remember which, radius = 2
b. Equation of circle: (x-1)^2 + (y+2)^2 = 40 (I think, again the signs might be the wrong way round)

for


For the trapezium rule question I didn’t use radian mode on the calculator, do you think they would take much marks off that?
I think you'd maybe lose 2 or 3 because all your y values would be off
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