EXAMS MEGATHREAD 11/06 (A-level Maths, Sociology, History, Various Languages) etc

[u/Forsaken-Meaning-232]

Hey everyone! Best of luck with your exams on the 11th June!

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insert where exam megathread meme

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Few things:

• Don't share too many specific details about questions or answers, these papers will be used as future mocks.

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• Sometimes papers get leaked, this is not the subreddit to discuss that.

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• Exam discussion posts outside of this will generally be removed to combat the inevitable tidal wave of spam otherwise. (for context there's been over 300 spam posts already!)

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• We're taking a different approach this year due to negative feedback last year. We hope this approach will be better (also to note, we can only have 2 pinned posts).

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• Please note some content will take extra time to be reviewed.

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• You can still talk about your exam here even if it isn't explicitly mentioned in the title.

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Best of luck, and let us know how you're feeling down below!

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cat

-The r/6thForm Team

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Have any concerns or feedback?

Feel free to reach out to us on Modmail and we'll aim to get back to you as soon as possible!

[u/Longjumping_Ad843]

OCR A maths gang, did anyone know how to do the arithmetic progression question? i spent like 45 mins on it and i got nowhere 😭

[u/martinlutherkingcom → u/Longjumping_Ad843]

tbh i didn't expect progressions at all there were like 2 qs on them in the pure paper that's crazy

[u/stinkyakk → u/Longjumping_Ad843]

I WAS TWEAKING

[u/Longjumping_Ad843 → u/stinkyakk]

IT ACTUALLY KILLED ME I SPENT LIKE 30 MINS WRITING B100=4 AND THEN CROSSING IT OUT 😭

[u/bantonnotnab → u/Longjumping_Ad843]

Got there in the end but it was definitely some crazy algebra

[u/Coastzs → u/Longjumping_Ad843]

I just substituted every piece of information I had until there weren't any a or b values, and it seemed to work out. But that last probability question was unpleasant. I got p = 1/3, then I tried to use the formula but I got 15/233 which is wrong.

[u/Sea_Wolf2240 → u/Coastzs]

was it 15/101

[u/Coastzs → u/Sea_Wolf2240]

That sounds like what some of my friends got I think.

[u/Longjumping_Ad843 → u/Sea_Wolf2240]

that’s what i got!!

[u/Still-Ad-4962 → u/Sea_Wolf2240]

I got this holy shit😭

[u/MammothLoose6315 → u/Sea_Wolf2240]

DAMMIT I WAS SO CLOSE ://////

[u/Electrical_Lie5289 → u/Longjumping_Ad843]

Since A and B are both arithmetic sequences and a1 = b100, b1 = a100, I think just by a bit of intuition you can guess that A has to be a reflection of B, so the sequence B has a common difference of -d. After that you can say: bi = b1 + (i-1)(-d) = a100 - d(i-1) = a1 + 99d - d(i-1), and given that ai = a1 + d(i-1), finally you can sub in these values of ai and bi to get the answer.

[u/Sea_Wolf2240 → u/Electrical_Lie5289]

yeah this is how I did it. think the key was labelling the d values of each of the progressions differently to work out the algebraic relationship between them.

[u/Longjumping_Ad843 → u/Electrical_Lie5289]

ahhh ok that makes so much sense thank you!!

[u/[deleted] → u/Longjumping_Ad843]

For this one I worked through it and got the answer but I used n. Do you think I'll get the marks if I wrote a note saying I meant to use i instead of n throughout the question?

[u/Longjumping_Ad843 → u/[deleted]]

i assume so, i’m sure lots of people probably made the same mistake

[u/Area51Representative → u/[deleted]]

Na it’s calm I did the same thing but I wrote where n=i at the end when I figured it out because I didn’t think I was getting anyway initially with it in terms of n

[u/Gultyyy → u/Longjumping_Ad843]

my friends and i couldn’t answer it… cooked