Edexcel D1 - 17th June, 2016 [Exam discussion]

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does anyone reckon that 62 is an A? and also if you get the values of w x y z whatever wrong (one of them) would you get follow through marks for your Gantt chart and scheduling but lose like 1 on each part?

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Reply 861

hogree

Original post by TH3-FL45H

Did you have to simplify 20x + 65y =< 520?

Also I got C=2x+3y. Would this not be right because we aren't given a value for capacity, only relative capacity?

Put that down as well. Should be right, there was no reason not to put that down

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Reply 862

pecora

Original post by cocacola212

yh thats what i put originally but when you put into the equation, your y values should be 1.5 times bigger than x values e.g. make c=9 and you'll see. it makes sense

Has it been confirmed that 1.5y + x is (3y + 2x) correct?

Can anyone here please tell me if I will get follow through marks for putting 1.5x + y (3x + 2y)?

(edited 7 years ago)

Reply 863

oinkk

I'm sorry, but charting and scheduling 14 activities, over half of the bloody alphabet, was a complete waste of our time and not a test of our mathematical ability.

Other than that question, the paper was very fair.

Reply 864

amy4121

link for the mark scheme?

Reply 865

iMacJack

objective function was maximise x + 1.5y

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Reply 866

Michellelyy

anyone didn't finish the paper? i feel like there isn't enough time and i couldn't finish the last question...

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Reply 867

Aerosmith

Original post by iMacJack

As last year's paper was easier, I would guess around 57 for an A. Cannot be much higher than that

Reply 868

ISAAQAHELP

anyone get more than 69/75?

Reply 869

Serine Soul

Original post by cocacola212

did anyone get c= 1.5x + y

I did that lol idek if I'm right

Reply 870

Jporter1399

Original post by brokeins1

For the y value of V I got 280/59, anyone could confirm or correct me ?

That's exactly what I and most people I know got!!

Reply 871

hogree

Original post by Michellelyy

anyone didn't finish the paper? i feel like there isn't enough time and i couldn't finish the last question...

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Finished every Past Paper with a good 10/15 + to spare. This one, the CPA and Linear Programming both were time consuming, to add onto the painful Route Inspection and Algorithm. Way too long. Not impressed with Edexcel - not testing mathematical ability but speed.

In the end, skipped over the scheduling (just filled out the critical path basically) and just about finished the Linear Programming although didn't test all the vertices for the last part.

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Reply 872

miless090

Original post by Zenphos

If you look at the grade boundaries from edexcel D1 the mark for an A is generally between 60-70 marks. Edexcell have also posted on their website that their grade boundaries are going up across the board, in C1, C2. FP1 ec. I may still be wrong but edecel have been being a bit harsher than usual recently.

show me where they've said that they're raising the boundaries then

Reply 873

brokeins1

Original post by iMacJack

Not sure bout the gradeyes you would get your ft marks but lose A marks

Reply 874

GusMick

so the paper was bad, i didn't finish. Id say i skipped the last third of q7 and the last half of q8. Luckily a C on this and a decent ums on c3 and c4 should still see me getting an A overall. But idk if i even got a C on this

Reply 875

Waffles15

Original post by roberto1233

For the linear programming i used point testing and found that the highest capacity was when x=12 and y=3 , using C=2x+3y. Then i put it into 20x + 65y to get the cost as £435. (11,4) and (10,5) had lower total capacity so i dont think they are correct if anyone used them. For the algorithm one why did people do 122x0.5 i didnt see y being 0.5 anywhere on the question so i used the value of y in the table which was 5 right? then did 122x5 to get 610, is this correct.