D1 Jan 2012 Edexcel Post-Exam Discussion - Solutions and paper in first post

omd im so annoyed, lost a chunk of marks. for dikjstra's question i got 115 instead of 114, and i knew it was wrong because i was using route G but the following question said route G has to be used

(edited 12 years ago)

Reply 22

Moiraclaire

A matching is a bipartites graph where no node has a degree greater than 1 ? would that get the mark !?
That's waht I said.

I think I got 69-72, if I lost any marks its for wordy questions

Reply 23

Original post by Arsey

Fairly kind paper

Solve the route inspection, means you MUST start and end at the same point

Hi Arsey, for the question regarding a new path between B and F for the chinese postman algorithm questions, i put that if a new path was formed, then F would have to be traversed again because it will become an odd node......

Reply 24

for some reason for 2a that C had an odd valency(dont know what i was thinking), will i lose all marks for that question or still get 1 or something for doing the correct working out?

Reply 25

Mathematix

Original post by Jorgeyy

Got everything right except wrote 2 12's instead of 1 and a 13 when doing my bubble sort, so will I just lose one for accuracy? And how will this affect the first fit decreasing 3 marker with this list?

I calculated the lower bound fine at least.

Apologies for perhaps being impatient but it seemed you answered posts after

Reply 26

Original post by Arsey

arsey for the dijkastras i got 115! and if i got the two lines correct but labelled the feasible wrong how many marks would i get?

Reply 27

Original post by Jorgeyy

Apologies for perhaps being impatient but it seemed you answered posts after

for dijkastras i got 115?

Reply 28

i got around 63 marks, is that still an A ?

Reply 29

Original post by otrivine

arsey for the dijkastras i got 115! and if i got the two lines correct but labelled the feasible wrong how many marks would i get?

I got 118 for dijkastras :/ and i got the lines and the feasible right but optimal point and objective line wrong. I always think i've done okay then read this and im like :O ****.

(edited 12 years ago)

Reply 30

Original post by James A

i got around 63 marks, is that still an A ?

did you see james it was 114 not 115! :frown:

Reply 31

I got around 52 marks, what grade do you think this will be?

Reply 32

username916760

so where can i find the markscheme?

Reply 33

Jukeboxing

Should get between 69-71 depending on how they mark.

January boundaries for D1 are higher than for June, so im guessing 65+ for an A.

Reply 34

JOR2010

Original post by Arsey

Fairly kind paper

Solve the route inspection, means you MUST start and end at the same point

But the route inspection did NOT specify a start node, surely the shortest path was starting at E/F, and adding the arc worth 10 to the tree? (EG SEMI-EULERIAN?)

Reply 35

Original post by otrivine

did you see james it was 114 not 115! :frown:

yeah but another dude said he got 115, so we might get 5 or 6 for that question

Reply 36

Original post by JOR2010

But the route inspection did NOT specify a start node, surely the shortest path was starting at E/F, and adding the arc worth 10 to the tree? (EG SEMI-EULERIAN?)

how did u find it??? think i done terrible how how come in increase i thought decrase!

Reply 37