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OCR D1 June 10

NOT MEI!

Anyone doing it? Thought I start a thread so we could talk about it. I find the definitions of all the different graphs & drawing them difficult to get around sometimes. Otherwise, TOO MUCH WORDS! which could be a disadvantage to me, because I take sooo long to read/understand the questions!

Over to you!

Reply 1

dknt

12

Isn't the OCR D1 exam on June 22nd... I find it hard to believe it has already passed. :woo:

Reply 2

AxZim

Yeah, i thought it was on the 22nd too lol...
But hopefully shouldnt be too hard... i failed the last one lol, had a nosebleed in the middle of the exam, paper got covered in blood hahahaha... cudnt concentrate either :P

Reply 3

Revolution is my Name

15

I'm doing it. It's **** and boring and tedious and it makes me want to cry.

Reply 4

JChoudhry

14

Doing it, I forgot everything I learned from back in January. Hate simplex! :mad:

Reply 5

dknt

12

AxZim

Yeah, i thought it was on the 22nd too lol...
But hopefully shouldnt be too hard... i failed the last one lol, had a nosebleed in the middle of the exam, paper got covered in blood hahahaha... cudnt concentrate either :P

Nice present for the examiner. :p:

Reply 6

AxZim

dknt

Nice present for the examiner. :p:

yh lol i know =] im suprised i didnt get any message back haha

Reply 7

MCYan

OP

13

what u mean it has already passed?!

Reply 8

MCYan

OP

13

Does anyone has the mark scheme for June 05? please OCR thankyou

Reply 9

MCYan

OP

13

Guys did you do Jan 10 last question? That you have to analyse it in terms of slack variables, I mean how? I looked at the mark scheme, I don't really understand it.

OP

oh god..... failed

That was not too bad a paper. EIGHTEEN marks for simplex though?! I did notice a trip up in the route inspection though where odd node B became even and even node F became odd! I bet that caught a lot of people out... :frown:

I think it was a good paper though. :smile:

I got 5 fruit salads as the answer for simplex if anyone agrees with it...

Reply 12

yu80359

yes 5 frist and y=0 z=0 forget what is y and Z for = =

Reply 13

yu80359

yes 5 fruit and y=0 z=0 forget what is y and Z for = =

Reply 14

MCYan

OP

13

i got lots of negative values for that question. What two constraints you guys put for part 1? something todo with sugar..

Reply 15

JChoudhry

14

I loved that paper!!! :biggrin:

but I skipped the shuttle sort question :frown:

lost 4 easy marks

Reply 16

toronto353

19

Didn't think it was too bad looking back as a whole. Hopefully someone will publish answers at some point for this paper. Overall 22 marks for the last question is the make or break question. Get it right that's great towards your mark, if not, they could lower your grade. I have a feeling that might impact on UMS boundaries, but it's in the hands of the markers now.

Reply 17

nottud

Was tlaking to ym friend tonight this was what he said:

questions i can remember: 1st question: sorting and stuff, last (lowest) number is in correct position 7 passes needed to get 95 in correct position takes the 500 seconds

graph stuff, which was a bit annoying can't really tell how i've done linear programming x = y with inequalities i cant remember 3y = 21 - 2x co-ordinates = 0, 7 for optimum and the value = 42 k= 4 then pk = 42 when (21/5, 21/5) so that means K>= 5
dijkstras stuff root inspection problem 5.25km for the route inspection problem answer lower bound 1.6 upper bound 1.9

simplex make the inequalities pretty easy p = 500 so 500mg of vitamin C, x =5 so 5 litres of fruit salad smoothie and none of anything else last one is show that

I think what he said mostly right except K I think should be 4 and not 5. I also had one of the graph equations in a different but eqiuvalent form.

OCR D1 June 10

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