Competition - post a photo you've taken of nature >>

OCR (non mei) D1 Wednesday 15th June 2016

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Reply 60

Charco63

grade boundaries: 55/56 for A?

Reply 61

Needham98

Unofficial mark scheme anyone?

Reply 62

paccap

Original post by rich1334

399x and 329y with a total cost of £1715 :smile:

Got the same as you. 4 pageboys and 1 bridesmaid

Reply 63

Furthermaths100

For question 7, it said find the lower bound starting and finishing a Y but in part a you deleted vertex Q. Did you have to delete vertex Y for this part? Anyone get 102 minutes for lower bound?

Reply 64

Furthermaths100

For the last question did people get the route of weight 295 minutes?

Reply 65

rich1334

Original post by Furthermaths100

For the last question did people get the route of weight 295 minutes?

I did nearest neighbour from Q as asked, looked at that cycle and created one from Y which was bang on 300 :smile:

Reply 66

JL72SR

I got for the lower bound 118 and upper bound as 135? Also for the last question was it exactly 300?

Reply 67

Furthermaths100

It asked for the lower bound starting and ending at Y. That means delete arcs attached to Y. So surely 102 and not 118.

Reply 68

Furthermaths100

Original post by JL72SR

I got for the lower bound 118 and upper bound as 135? Also for the last question was it exactly 300?

I got 295 as weight of cycle was 130, weight of the stops was 30x5+10+5 so 165, add them is 295.

(edited 7 years ago)

Reply 69

RmAthS

Original post by rich1334

I did nearest neighbour from Q as asked, looked at that cycle and created one from Y which was bang on 300 :smile:

I also got bang on 300 :smile:

Reply 70

Furthermaths100

Original post by RmAthS

I also got bang on 300 :smile:

Weight of cycle 130 right? So surely 165 waiting time as you wouldn't wait at Y

Reply 71

Gogregg

Original post by Furthermaths100

I got 295 as weight of cycle was 130, weight of the stops was 30x5+10+5 so 165, add them is 295.

Two of the stops were 5 minutes...

Reply 72

Mathematicus65

I reckon 66 - 100 UMS
61 - A*
55 - A
50 - B

Reply 73

rich1334

Original post by Furthermaths100

Weight of cycle 130 right? So surely 165 waiting time as you wouldn't wait at Y

The stops in the questions were as follows:

2x5 minutes, 1x10 minutes and 5x30 minutes. You need to stop at Y so the visitors could look around the place :smile:

Reply 74

TheNicholas

Very poor mark scheme:
I just typed number that I saw on my paper into my calc, pretty sure the pageboy bit is wrong but oh well...
27
8
25 13 211
12
13
70
2
5
1785 (think it's 1715 or something)
135
88
63
120
300

Reply 75

Furthermaths100

Original post by rich1334

The stops in the questions were as follows:

2x5 minutes, 1x10 minutes and 5x30 minutes. You need to stop at Y so the visitors could look around the place :smile:

Oh right I though the waiting time was for rest time, didn't read the question properly...

Reply 76

uuss00

For the last question it asked for a close route is that the same as a closed cycle? I assumed it meant you didn't have to back to the start but from looking at this I don't that is correct.

Reply 77

EconEast

Original post by uuss00

For the last question it asked for a close route is that the same as a closed cycle? I assumed it meant you didn't have to back to the start but from looking at this I don't that is correct.

You had to go back to Y.

Reply 78

rebirth61213

I've been looking like a complete tit for the past hour by saying 'Percy Li' in a variety of different tones, accents, volumes and speeds in order to see if OCR chucked in another pun (remember Roland Kneede the baker and Rhoda Raghe the avid driver with a horrendously contrived surname?). Anybody made any progress?

iirc the question was about road maintenance?

(edited 7 years ago)

Reply 79

CC21231