GCSE Edexcel Maths Unit 3 19/06/2012 Exam Discussion

The reason why some people got 1,373,900cm³ for question 17b is that they rounded it to 1d.p at the start, I kept everything in decimal form, until my last answer in which it got 1,373,923.003 (or something like that) and it said to round it to the nearest one d.p so it has to be 1373923cm3
So please tell me I am write, because I had done the same method, as everyone else

Reply 581

Graham981

Original post by elephants :)

Could someone please remind me how many marks the soap powder question was worth? ^^

I think it was worth 4 marks.

Probably the easiest 4 mark question...?

Reply 582

pythagorean

Original post by brainbox69

Got slightly differnet answers to what was posted before:
1. 20cm
2. 4 years
3. 40/57
4a. £780
4b. 15% decrease
4c. £119.44
5. 5kg (middle one)
6. rotate 90 degrees clockwise with centre of rotation at (1,1)
7. x=1.8
8a. gradient = 40
8b. this means 40miles/gallon
9. 312m
10. packages weigh 0.8kg each
11a. (top table) 1, -1, 7
11b. graph (positive curve)
11c. -0.7 and 0.7 (wherever cuts x-axis on your graph)
12. 1.3 x10⁷
13a. y=x/60
13b. 9
14a. -1,0,1,2,3
14b. (inequalities question) large triangle in middle of graph
15a. i) 2a
ii) a-b
iii) -a-b
15b. a-b
15c. they are both a-b and share the point A, so must be straight line
16a. (2a-7) / 3
16b. x=2/3 y= -1.5
17a. 320ml
17b. 1373600cm³
18.5.82cm

Hope all these are right

i got almost identical answers to these except for simultaneous question i put 0.6666 and 2 but i put -1.5 in my working so frustrating!! Also for the cone one did you have to square it as for the part b about volume i did 2 cubed?

Reply 583

Graham981

Original post by A193

The reason why some people got 1,373,900cm³ for question 17b is that they rounded it to 1d.p at the start, I kept everything in decimal form, until my last answer in which it got 1,373,923.003 (or something like that) and it said to round it to the nearest one d.p so it has to be 1373923cm3
So please tell me I am write, because I had done the same method, as everyone else

You get method marks (M1).

If they have a range in the mark scheme for example :

Answer : "1,373,900 - 1,373,950" you'll get full marks.

Reply 584

elephants :)

Original post by Graham981

I think it was worth 4 marks.

Probably the easiest 4 mark question...?

Thanks!

Reply 585

Magenta96

16

yep I think that's right, I squared k for part a and cubed k for part 2 ^

Reply 586

pythagorean

I have 209 UMS so far from unit 1 and 2. Does anyone one know what mark id need for an a*? Not the ums just the paper mark.

Reply 587

scienceboy16

Who's got a copy of the exam paper so solutions can be made?

Reply 588

saq96

for Q 13 i used the decimal form and so my answer was 9.18 will i get penalised ?

Reply 589

JoshThomas

For the inequality graph where you had to find the shaded region, were you supposed to use dotted lines or solid to show the inequality

Reply 590

elephants :)

Original post by pythagorean

I have 209 UMS so far from unit 1 and 2. Does anyone one know what mark id need for an a*? Not the ums just the paper mark.

You need 151 UMS... So I think that's around 76/80?

Reply 591

krisshP

14

Original post by pythagorean

I have 209 UMS so far from unit 1 and 2. Does anyone one know what mark id need for an a*? Not the ums just the paper mark.

Hey I got 209 UMS so far as well :smile:

lol

anyway you need 76/80 for an A*.

Reply 592

Graham981

Original post by pythagorean

I have 209 UMS so far from unit 1 and 2. Does anyone one know what mark id need for an a*? Not the ums just the paper mark.

Well we know that 360, in total, is A*

so, 360-209 = 151 UMS

151 UMS = A* in Unit 3

151 UMS = around 75 marks

You need around 75 marks.

Reply 593

JoshThomas

Original post by pythagorean

I have 209 UMS so far from unit 1 and 2. Does anyone one know what mark id need for an a*? Not the ums just the paper mark.

74-77

Reply 594

krisshP

14

Original post by JoshThomas

For the inequality graph where you had to find the shaded region, were you supposed to use dotted lines or solid to show the inequality

Dotted lines for all inequalities

Reply 595

krisshP

14

Has a question paper with all the solutions inside it been uploaded yet?

Reply 596

scienceboy16

Hi, I need 158 ums marks for an A* how many raw marks you guys think that is?

Reply 597

Graham981

Original post by JoshThomas

For the inequality graph where you had to find the shaded region, were you supposed to use dotted lines or solid to show the inequality

Damn it - you just reminded me - I forgot to use dotted lines.

Just when I thought I done "okay",things got worse.

Reply 598

Graham981

Original post by scienceboy16

Hi, I need 158 ums marks for an A* how many raw marks you guys think that is?

158 is probably around 77 marks.

Reply 599

pythagorean

Original post by krisshP

Hey I got 209 UMS so far as well :smile:

lol

anyway you need 76/80 for an A*.

Ahhh that's so annoying i reckon i dropped about 8 marks which means I'm going to miss it by so little :frown:

GCSE Edexcel Maths Unit 3 19/06/2012 Exam Discussion

Quick Reply

Related discussions

Latest

Trending

Trending

Articles for you