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OCR MEI D1 17th June

Reply 100

Dan?

jayshah31

60 + 61 (*checks with calculator*) should do it. I assume you think you got at least a C in FP2?

Spoiler

I reckon I got about a mid C in FP2, so I need a low C in D1.

Reply 101

Chriz M

10

I'm off to do some last evening revision, and get a good nights sleep.

Good luck everyone here with D1, lets hope some nice questions come up.

Reply 102

DevilsJackass

'wtf' sums up this module pretty nicely

Reply 103

jayshah31

14

Chriz M

I'm off to do some last evening revision, and get a good nights sleep.

Good luck everyone here with D1, lets hope some nice questions come up.

DevilsJackass

'wtf' sums up this module pretty nicely

The last word of the expansion of 'wtf' will do just fine.

Expansion :proud:

If I don't get to this thread tomorrow, good luck all!

Reply 104

Internet Addict

jayshah31

I think it's relatively rare to be honest given that it's aggregation that is going to save me from failure. What exam board is your single ("normal") maths?

Normal maths is edexcel

Reply 105

DevilsJackass

jayshah31

The last word of the expansion of 'wtf' will do just fine.

Expansion :proud:

If I don't get to this thread tomorrow, good luck all!

lets be honest here...d1 isnt worth the effort of expanding that :shot:

Reply 106

Dan?

DevilsJackass

'wtf' sums up this module pretty nicely

agreed.

Some of it is so simple, and other bits are just weird.

Reply 107

DevilsJackass

can someone explain the june 08 algorithm question for me? seriously wtfs going on there:

The following algorithm acts on a list of three or more numbers.
Step 1: Set both X and Y equal to the first number on the list.
Step 2: If there is no next number then go to Step 5.
Step 3: If the next number on the list is bigger than X then set X equal to it. If it is less than Y then set
Y equal to it.
Step 4: Go to Step 2.
Step 5: Delete a number equal to X from the list and delete a number equal to Y from the list.
Step 6: If there is one number left then record it as the answer and stop.
Step 7: If there are two numbers left then record their mean as the answer and stop.
Step 8: Go to Step 1.

(i) Apply the algorithm to the list 5, 14, 153, 6, 24, 2, 14, 15, counting the number of comparisons
which you have to make. [3]
(ii) Apply the algorithm to the list 5, 14, 153, 6, 24, 2, 14, counting the number of comparisons which
you have to make. [3]
(iii) Say what the algorithm is finding.

Reply 108

BJack

19

I seem to be fairly alone in finding D1 incredibly easy. >____>

DevilsJackass

can someone explain the june 08 algorithm question for me?

(i) Step 1: X = 5, Y = 5;
2: there is a next number (14);
3: X = 14; Y = 5;
4: 2: there is a next number (153);
3: X = 153, Y = 5;
4: 2: there is a next number (6);
etc.

(ii) Similar.

(iii) The algorithm is finding the smallest (Y) and largest (X) numbers in a list, then deleting them. By repeating this process, the median is found.

what about step 5?

DevilsJackass

what about step 5?

That tells you to delete the values in the list equal to X and Y (i.e. the largest and smallest remaining values in the list).

Reply 111

rgjf1307

How quickly could I learn this module? I have the textbook and a friend's revision notes. If I stayed up all night would I be able to learn most of the stuff?

Reply 112

Dan?

yessssss finally got the hang of CPA. What timing.

Reply 113

i_hate_examz

10

Dan?

yessssss finally got the hang of CPA. What timing.

Ooo, any tips mate ?

Reply 114

DevilsJackass

BJack

That tells you to delete the values in the list equal to X and Y (i.e. the largest and smallest remaining values in the list).

chilled then repeat i assume. thanks

Reply 115

BJack

19

DevilsJackass

chilled then repeat i assume. thanks

That's right. :smile:

rgjf1307

If I stayed up all night would I be able to learn most of the stuff?

You could probably learn all of D1 in a night if you really put your mind to it (and if D1 is your kind of thing, I guess). There's not a lot to it once you work out what's going on.

Reply 116

i_hate_examz

10

http://www.meidistance.co.uk/npapers/d106ja_lmxhfg.pdf

How is the Queueing + Paying column for question 6(iv) worked out ?
Answer on page 17.

Thanks in advance !

Reply 117

Dan?

http://www.youtube.com/watch?v=IoGg6ztkqSU

watch that for CPA

Reply 118

Dan?

i_hate_examz

http://www.meidistance.co.uk/npapers/d106ja_lmxhfg.pdf

How is the Queueing + Paying column for question 6(iv) worked out ?
Answer on page 17.

Thanks in advance !

first using the random numbers for the type of customer, work out what type of customer each of them are. Only use each number once. Then for the time taken at the till, use numbers from one of the lists, depending on what type of customer they are. The next customer cannot start paying at the till until the previous one has finished.

Reply 119

rgjf1307

BJack

That's right. :smile:

You could probably learn all of D1 in a night if you really put your mind to it (and if D1 is your kind of thing, I guess). There's not a lot to it once you work out what's going on.

Thanks, I better get started. Might need to stock up on sugar and caffine at some point.

OCR MEI D1 17th June

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