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

1. (Original post by -jordan-)
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
2. (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.
3. 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?
4. (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
5. (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
6. (Original post by Zyzz_aesthetic)
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
Nah it's 520
7. (Original post by yelash)
For the first part I did 10+12=24 but noticed lucky 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 :/
8. (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.
9. (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
10. (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..
11. (Original post by Zyzz_aesthetic)
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
I think your critical region is wrong. You went above x=2y and not below.
12. 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
13. 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
14. (Original post by sufiyan1999)
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
Why is kruskals wrong there is not other information to say k between any other boundary
15. (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
16. (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
17. (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
I went below, got the right objective line equation and I still got £500 :/
18. (Original post by yelash)
I went below, got the right objective line equation and I still got £500 :/
Yh you do go below, so your right there but i got 500 first then got 505, oh well
19. (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)
20. (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

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