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

All of this UMS mark stuff is actually quite confusing for me
How many marks are there in this Unit 3 exam?
Could someone put like a predicted grade list, so how many i need for a D, C, B, A, A* please?
I basically want to know how many marks i need for a C in this exam because i need a D to get a B overall and i'm happy with that

Thank-a-you :P

Hey, im doing this paper... and i cant do question 2, can anyone tell me how to do it, please??
Can anyone check my first answer too, i dont have the mark scheme...

The UMS is just pretty much double the marks of the exam. For example in Unit 3 there are 80 marks and 160 UMS availiable. A C grade should be around 56 marks, however the grade boundaries may move around slightly depending on how difficult students seem to have found the exam. So roughly a C should fall between 55-60 marks i think. If you're unsure, just check your UMS total so far, see how many you would need to get to your grade overall and calculate what percentage this figure is of the total UMS availiable in this exam. For example, if someone was on 200 UMS and wanted an A, they need 120ums in this exam to get an A overall. 120 ums as a percentage of total availiable in this exam is 120/160 which is 75%.

Question 2:
Find an expression for the entire outer of the shape....
So it'll be [starting from the leftermost side, going clockwise round the sides]
2x + 4x+2 + x + x+1 + 3x + 5x+3
Put in the perimeter to find the value of 'x'
Which gives you...
16x + 6 = 54
16x = 48
x = 3

Split the shape into 2 boxes
One box- 4x+2 by 2x
One box x+1 by 3x

Find the lengths by substituting x in
One box- 14 by 6
One box- 4 by 9

Calculate the area- length time width
One box = 14 x 6 = 84
One box = 4 x 9 = 36

Add these together
84 + 36 = 120

Area = 120 cm squared

I think this is right...? If anyone would like to check, they're most welcome to!!!

I'm confused now and I worked out that x=3.57, but you got x=3

I'm sorry- I didn't mean to confuse you!

And there's no guarantee I'm right ;D

How did you work it to x = 3.57?

lol, its fine.

i simplified the equation for the shape and got 14x+4=54
then i solved that to get x:
14x+4=54
14x=50
x=50/14
so x=3.57

So we've just simplified the equation differently :P
I looked back at the shape, and from what I can see, I *think* it's 16x + 6 = 54
But if I'm wrong, please tell me... because I want to be able to get it right :P

You don't have a markscheme, by any chance?

oh, yes it it 16x+6=54,
my mistake.
No i dont, my teacher is stingy about them.

...and I thought it was just me...

My teacher gives us to do it in the lessons so i havent done any practice in exam conditions and I really neeed to, so now I need to find papers myself...

Not just you at all
My target in Math tends to be- "READ THE QUESTION!" :P

I don't get lots of practice in exam conditions, I suppose- I do papers without help, but I rarely worry about time, because I find the limits reasonably okay.

Good luck on the papers- we were given printed copies, and I don't own a scanner, so I'm of no help I'm afraid!

Aha, no problem, easy mistake to make- pretty sure I made it 14 the first time I added it, and then I realised when I checked! :P

I have a brilliant tendency to add numbers instead of multiplying... and I get ahead of myself, and answer what I think the question is, rather than reading the question... Marking my practice papers is an amusing experience

Mean person! We were given an edexcel sample, and an edexcel mock paper, and mark schemes for these later, so we had to do them ourselves first!

Hi,

At the moment these are my UMS:

Unit 1: 102/120 - A
Unit 2: 98/120 - A

What is the lowest mark I need in Unit 3 to still retain my A??????????
What mark do I need to get an A*, I have worked it out, but I just felt that I had to share it with you guys, because I am really worried about getting an overall B.

Hi,

At the moment these are my UMS:

Unit 1: 102/120 - A
Unit 2: 98/120 - A

What is the lowest mark I need in Unit 3 to still retain my A??????????
What mark do I need to get an A*, I have worked it out, but I just felt that I had to share it with you guys, because I am really worried about getting an overall B.

Hi,

Here are some mock and practise papers for Unit 3 and the Mark Schemes. Credit goes to Edexcel for producing great quality papers for us. Enjoy and please comment

Happy Revising!!

The UMS is just pretty much double the marks of the exam. For example in Unit 3 there are 80 marks and 160 UMS availiable. A C grade should be around 56 marks, however the grade boundaries may move around slightly depending on how difficult students seem to have found the exam. So roughly a C should fall between 55-60 marks i think. If you're unsure, just check your UMS total so far, see how many you would need to get to your grade overall and calculate what percentage this figure is of the total UMS availiable in this exam. For example, if someone was on 200 UMS and wanted an A, they need 120ums in this exam to get an A overall. 120 ums as a percentage of total availiable in this exam is 120/160 which is 75%.