AQA Mathematics MD01 Decision 1 – Friday 24th June [Exam Discussion Thread]

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There was no answer, you just had to do the algorithm. But I did get AJ as 13. It said find the shortest distances to all the fair ground rides or something like that. The next question was 1 mark and was the shortest route from A to G.

A-J was 15
A-G was 13

point E or D the one you had to make a bridge with was 9

the bridge reduced distance to G but distance to J didnt change.

this tells you x>>3 and x<4

so x=3

Reply 181

-jordan-

Original post by Busted838

A-J was 15
A-G was 13

point E or D the one you had to make a bridge with was 9

the bridge reduced distance to G but distance to J didnt change.

this tells you x>>3 and x<4

so x=3

Ah yes, I remember now. AJ was 15.

Reply 182

SM-

Can someone answer this?
If I got X and y correct in the last question but got profit to be 600 by 20x + 15y how many would I lose?

Reply 183

Busted838

Original post by SM-

Can someone answer this?
If I got X and y correct in the last question but got profit to be 600 by 20x + 15y how many would I lose?

should only be 1

Reply 184

Zyzz_aesthetic

Original post by BanterBus

I got £505 too, the last section was 3 marks so we should pick up atleast 1 ft mark.

I got £505 too i got all the lines correct, there was two intersect i found the first one gave me x=20 and y=10, subbing into p=15x + 20y, gave £500, i know for sure that 20 and 10 are correct as i used the simultaneous eq however i tried the other interect point and found x=27 and y=5 which gave £505 obvs i went with £505 i dont know how ppl got £520 maybe used wront points or line. Fingers crossed

Reply 185

Hjyu1

Original post by Zyzz_aesthetic

Nah it's 520

Reply 186

harv221

Original post by yelash

For the first part I did 10+12=24 but noticed lucky :smile:

That would've haunted me forever!!
Wasn't sure what to do for the last two parts. It said start and finish at any point, so I added 10 to the total time they gave us, and for the last part I added 12 and stated the one that he didn't finish at from the '10'

which question is this about? pretty sure i did the 10+12 :/

Reply 187

Zyzz_aesthetic

Original post by Hjyu1

Nah it's 520

Tbh at this point i am just hoping i am right but your probably right, i wouldnt have cared much if only AQA didnt **** me with core 3.

Reply 188

Hjyu1

Original post by Zyzz_aesthetic

Tbh at this point i am just hoping i am right but your probably right, i wouldnt have cared much if only AQA didnt **** me with core 3.

I did c3 last year such a nice paper what came up in yours

Reply 189

Zyzz_aesthetic

Original post by Hjyu1

I did c3 last year such a nice paper what came up in yours

Yh i agree all the c3 papers from 2015 and before were all standard, same pattern but this year, i kid you not most retarted questions like i had my friends who get As **** up, **** like secx + tanx= 5, show that secx - tanx= -0.2, and it was like 2-3 mark and then you had to find x, then find the angle, so if you coukdnt do the 3 marker you lost the next 5 marks **** like that..

Reply 190

-jordan-

Original post by Zyzz_aesthetic

I think your critical region is wrong. You went above x=2y and not below.

Reply 191

sufiyan1999

Oh i see well i did djikstra right and got A-G to be 13 in that case. But i misread the question and thought the route it wanted was A-J
Also got X=3

Reply 192

sufiyan1999

Mistakes I made
Small error on one of the nearest neighbours
Read the wrong coordinates for max profit
Wrong route on djikstra but algorithm was right and I gotX=3
Feel quite good about my graph theory answers
Oo and the kruskals question asking for an inequality I put k>10 which is apparently wrong.
Im going for around 65

Reply 193

Hjyu1

Original post by sufiyan1999

Why is kruskals wrong there is not other information to say k between any other boundary

Reply 194

sufiyan1999

Original post by Hjyu1

Why is kruskals wrong there is not other information to say k between any other boundary

Apparently according to people on this its 10 <K<14??
Not sure. But i got the 10

Reply 195

Zyzz_aesthetic

Original post by -jordan-

I think your critical region is wrong. You went above x=2y and not below.

I thought i did too but i used my graphics cal to plot the region x>2y which is the right inequality i dont think i got that wrong i am not sure where i messed up shm :frown:

Reply 196

yelash

Original post by Zyzz_aesthetic

I thought i did too but i used my graphics cal to plot the region x>2y which is the right inequality i dont think i got that wrong i am not sure where i messed up shm :frown:

I went below, got the right objective line equation and I still got £500 :frown:

Reply 197

Zyzz_aesthetic

Original post by yelash

I went below, got the right objective line equation and I still got £500 :frown:

Yh you do go below, so your right there but i got 500 first then got 505, oh well

Reply 198

yelash

Original post by harv221

which question is this about? pretty sure i did the 10+12 :/

The Chinese postman question which had several variations/parts but only was like 9 marks total.
Pretty sure my answer to a) was right but i wasn't really sure for b) or c)

Reply 199

yelash

Original post by Zyzz_aesthetic

Yh you do go below, so your right there but i got 500 first then got 505, oh well

Well the variation between £500/£505 can be explained by a sight variation in lines because both my values were values which i rounded down. This was necessary as rounding up from e.g. 10.5 is not right as it would be outside the feasible region.

However the general consensus seems to be £520 so I'm not very confident. If it's £505 i should get the marks though due to reading errors and vise versa for you, but i don't it will be either :frown: