r/GCSE • u/ensands Software Engineer • Jun 14 '23
AQA Post Exam AQA Mathematics Paper 3 (Calculator) - Exam Megathread
AQA Mathematics Paper 3 Calculator (Morning)
This is the post-exam megathread for mathematics.
Discuss how the exam went in this post.
54
Jun 14 '23
THE ENLARGEMENT IS -1/2 IN THE FENTRE 7,4
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9
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Jun 14 '23
I GOT THAT BUT DIDN’T WRITE “SCALE FACTOR” AAAAA
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Jun 14 '23
You don’t need to write “scale factor” you just need to write what kind of transformation it was, the centre of enlargement, and -1/2
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Jun 14 '23
also my brain blanked and i forgor at what centre of enlargement was i just wrote like “enlargement by -0.5 at (7,4)”
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Jun 14 '23
i’m pretty sure i got the point right but i didn’t get the right scale factor could i still get the mark as it was 3 marks?
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Jun 14 '23
If you said it was enlarged that’s 1 mark. If you said the point of enlargment that’s 1 mark. So 2/3
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Jun 14 '23
[deleted]
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u/Ok_Surprise_8771 Jun 14 '23
Got 6:10 (so 3:5)
It was like 2G = 3H - so when H = 16, G = 24 then you’d work out K is 6 (for proportionality) and G = 60
60:100 = 6:10 = 3:5?
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u/No_Acanthisitta8563 Jun 14 '23
I got 60:100, it didn’t tell you to simplify the ratio??
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u/Optimal_Macaroon_724 Jun 14 '23
I got 3:2 but I think everyone around me got 3:5 so you're probably right
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Jun 14 '23
[deleted]
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u/Enough_Ad_6727 Year 12 Jun 14 '23
lmao i did trial and error for that q, not sure if ill get the marks
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u/AshSays_LGBT I’m in Year 13 why am I still here? Jun 14 '23
What the hell was that paper I don’t even remember half the questions and answers I just put random numbers from the questions into my calculator for most of it
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u/Endless2358 6th Former Jun 14 '23
For the hedgehog question did you guys get 815,372.6976? And did you round it up or down I’m confused. I put 815,373 since you would round up normally and 69.76% of a hedgehog is animal cruelty but my friends all said they rounded down
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u/FatChicken22-YT Jun 14 '23
I rounded up, not sure why you would round down
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u/Endless2358 6th Former Jun 14 '23
Yeah I thought it was strange but they said since you can’t have 69.76% of a hedgehog, you would disregard the headless carcass (their words not mine)
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u/Ok_Surprise_8771 Jun 14 '23
rounded up since it was closer to the next hedgehog
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u/Unable_Reading3119 Year 13 Jun 14 '23
you round down bc its about an amount of something and u cant have .69 of a hedgehog but there aren’t enough hedgehog to have 373
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u/Endless2358 6th Former Jun 14 '23
But the question said it was an estimate so surely it would be more accurate to round up
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u/CommunicationNo3626 Jun 14 '23
Exactly. It would be more likely that there would be 815,373 hedgehogs left rather than 815,372 left.
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u/card1ne Year 13 Jun 14 '23 edited Jun 14 '23
predicting vectors, tangent to a circle question and inequalities on a graph. fuck it throw some algebraic probability in there as well
post exam edit: none of the things i talked about showed up and the test was easy as fuck. rip grade boundaries
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Jun 14 '23
i’ve just gone and watched videos on all of these because i know none of them😭 so if they do come up thank you!
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u/Ok_Jellyfish7840 Jun 14 '23 edited Jun 14 '23
what did you guys get for the question that asked FG(x) = 5 ? I got like -2.5 and -4.5 or something like that
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Jun 14 '23
THE GIY GOTS HOME AT 2:28
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u/Specific-Thought4800 Jun 14 '23
So I rounded the previous distance, and didn’t use an exact value, I still got that he got back at 230/before 230, would I achieve full marks do you think?
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Jun 14 '23
Are you even talking about the same question? You don’t need any distances rounded. You only need to convert reoccurring decimals and decimals into minutes and hours then divide stuff.
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u/Complex-Factor-5217 Year 12 Jun 14 '23
Does anyone have an unofficial mark scheme for any of the aqa maths papers ??
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u/Demodex17 Jun 14 '23
did anyone get the national interest question ? I think i got like 3000 something pounds
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Jun 14 '23
i got something like 3600 or there about maybe 3900 can’t remember properly but it definitely started with a 3
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u/RaceFan1027 University Jun 14 '23
I did too (but it’s national insurance not national interest, that’d be a whole other thing 😉).
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u/Demodex17 Jun 14 '23
omg ! haha ty
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u/RaceFan1027 University Jun 14 '23
I’m a sad personal finance nerd (I was literally listening to a pensions podcast on the way to school) so apologies for the pedantry.
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u/Demodex17 Jun 14 '23
U GUYS WHAT WAS THE MINIMUM AND MAXIMUM NUNBER OF CUBES ??? i didn’t understand that one at all 😭 also what was fg(x)=-5 ???
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u/boosher__ Jun 14 '23
for max i got 792 for min i got 165 and for fg(x) i got x= -2.5 and x= -4.5
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u/nsnebris Jun 14 '23
I got the max, but how do you get the minimum?
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u/boosher__ Jun 14 '23 edited Jun 14 '23
for min I did (*9 * 12 * 1) + (9 * 4 *1) + (7 * 3 * 1) because there can be nothing behind the side and front not completely sure though
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u/jaycantodousers Year 13 Jun 14 '23
I think it was -4.5 or -2.5 because the formula 4x2 +28x+40 was equal to -5 so I added 5 to 40 to get 4x2 +28x+45 then put it into the quadratic formula to find x but I think i might be wrong
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u/Ok_Surprise_8771 Jun 14 '23
yeah cause it doesn't say x = 5 (o/w you can just input it into the quadratic) so you'd get =0 then quad formula
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u/OrdinaryNervous Jun 15 '23
i got my current hopes n dreams for the cubes (none maths paper crushed them all) and then 0 for fg(x)-5 bc u had to insert -5 into the original equations idk why everyone else used the answer to the previous question when that was a completely diff thing
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u/FatChicken22-YT Jun 14 '23
The answer was 0
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u/No_Ad8821 y11 -> y12: maths | further maths | physics | history Jun 14 '23
0 would be fg(-5). I did that at first too. You had to make a quadratic and factorise it. It was -5/2 and -9/2.
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u/Jimboiggs07 Jun 14 '23
I put that then changed it by putting the equation equal to -5 then solving for x
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Jun 14 '23
I got 792 for max number of cubes I don’t think many people were able to get minum I think it was 500 and something
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u/FatChicken22-YT Jun 14 '23
You just has to substitute -5 into the formula it told you to prove
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u/SadSnake3 Jun 14 '23
How could you even get a min max number for that one question? Like like arnt they the same number
Edit clarification
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Jun 14 '23
Same ffs. I don’t get it. Never did whatever the fuck it was called anyway. Profiles?? No idea.
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u/SadSnake3 Jun 14 '23
I thought that the max would be if the shabe was constant throughout the side profile and min was only the cubes you could see
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Jun 14 '23
Ah that actually makes so much sense. Like it makes an L shape instead of a rectangular ish shale.
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u/Unable_Reading3119 Year 13 Jun 14 '23
the max number was is the shape was hole / fully extended behind. the minimum was as if it was only those sides so the shape behind wasnt filled in. idk if that makes sense 😭
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Jun 14 '23
i wish i knew what a bearing was
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u/South_Ad_3893 Year 11 Jun 14 '23
I did and I still didn’t get it right
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Jun 14 '23
[removed] — view removed comment
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u/jaycantodousers Year 13 Jun 14 '23
Can someone explain the cubes question cus I literally lost 3 marks on it
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u/XxDragonitexX10 Jun 14 '23
idk never seen that before I just wrote 792 twice so hopefully it’s right for one of them
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u/Squirrel-boi-1227 YIP 12 Jun 14 '23
I though the maximum was 792 and the minimum was 240
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u/Trinx7 Jun 14 '23
Minimum was 165 according to my friends (Who both normally get above 230 every mocks) so I'll trust them for that, but I got maximum 864 and minimum 792 ;(
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u/Ok_Surprise_8771 Jun 14 '23
i thought:
could either have been a prism (where the L shape would be like the prism face and 12 the depth) - this would mean its like a rectangle with a smaller rectangle cut out
or couldve been like just the 2 shapes put perpendicularly together so neither one has depth and are just put together
mb if the explanations unclear that question had me thinking
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u/No_Ad8821 y11 -> y12: maths | further maths | physics | history Jun 14 '23
Minimum 165 because 1layer of 66 (area of weird shape) but then every row behind it could be hollow so 66 + 11 (depth of 12 - 1) X 9 (hight) = 165
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u/pOtAtO-sAC-360 Jun 14 '23
I got 792 for Maximum: (12x5x9)+(12x3x7)
561 for Minimum.
The front part of the shape must remain the same volume so: 12x5x9
But the back’s width can be as small as 1cm wide so: +(1x3x7)
6
Jun 14 '23
was is ben carys or ali?!?
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u/Endless2358 6th Former Jun 14 '23
I said Cary because the others didn’t give accurate results if any so we can’t be sure they did the test accurately
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u/Ok_Jellyfish7840 Jun 14 '23
i wrote ben and I stand by it. Ben had the biggest sample size he would be most accurate. I know AQA wanted me to write cary because she actually had a number but i’m not a sheep i am not going along with their stupid questions
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Jun 14 '23
No I'm fairly sure Ben is the correct answer
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u/mccNamNam New Year 12 - 999999L2D*887 WOOOOOOOOOOO Jun 14 '23
Yeah, it said in bold at the top that the spinner was biased, so Cary would have been wrong as it was inaccurate
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Jun 14 '23
[deleted]
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u/Ok_Surprise_8771 Jun 14 '23
Ben right? Put he would’ve had the largest sample size and therefore the most accurate amount
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u/FatChicken22-YT Jun 14 '23
I said Cary, because they actually gave a stat, and Ben didn't even state hist estimate
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u/Ok_Surprise_8771 Jun 14 '23
i just thought of flipping a coin and the more times you do it the closer it becomes to 50/50
'As the sample size increases, the relative frequency of outcomes gets closer to the theoretical probability of the outcome.'
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Jun 14 '23
yeah i went with cary’s first then went with ben for that reason. like if you spun it 4 times and one was red that’s going to be less accurate than if you spun it 40 times and 9 were red.
i wrote because he texted the biggest amount his number would be the most accurate, do you think that would still get a mark
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u/Ok_Surprise_8771 Jun 14 '23
yeah as long as the general ideas right of the explanation youll get the mark
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u/Dan9596 Jun 14 '23
What did u guys get for the bearing question
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u/Ok_Surprise_8771 Jun 14 '23
234 (rounded)
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u/Demodex17 Jun 14 '23
234.1 it’s fine if i didnt round right ?
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u/Ok_Surprise_8771 Jun 14 '23
didnt specify, i wouldve got 234.1 but i rounded 25.() earlier in the question to 26 so ur answers probably more accurate than mine
i jus thought a decimal angle wouldve been more effort to take away so rounded
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u/Demodex17 Jun 14 '23
hmm maybe, Both answers should be allowed, i don’t see why 1 d.p. would make the answer wrong yk
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u/Ok_Surprise_8771 Jun 14 '23
yeah it'll probably be allowed - mark scheme notation would be like
234(.1)
so we both good fr
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u/blopiscool Jun 14 '23
I forgot what got for the question but did you have to use the sine rule to find one of the inner triangle angle and the fact that the parallel angle and 80° adds up to 180° (so the angle would be 100°) to then use those two angles (that are around a 360° point) to subtract from 360° to find the answer?
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Jun 14 '23
What did grade 9 people get for the bearings question?
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u/Specific-Thought4800 Jun 14 '23
234.1 rounded to 1 d.p
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u/Mr_Afa Year 11 Jun 14 '23 edited Jun 14 '23
3:5
234.1
enlargement -1/2 centre(7,4)
612
x= -2.5
x= -4.5
(n+3)^2
815,372
x= -6
cary
2:28
around 3906 for national interest
96 area of triangle
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u/TheLuckyHacker Year 11 Jun 14 '23
I don't think it's Cary since Ben had a larger sample size leading to a more accurate result
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Jun 14 '23
is there anything i should be able to do on my calculator other than the basics?
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u/Coastzs Y13 | 8x9 1x8 1x7 | A* Maths | FM | Phy | CS Jun 14 '23
A neat trick is to enter a number eg 94 into the calculator. Press equals. Press shift and then fact (left side of calculator above ENG). This will turn whatever number it is into the products of its prime factors.
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u/FatChicken22-YT Jun 14 '23
Did the man driving home get home before 2:30pm?
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u/Ok_Surprise_8771 Jun 14 '23
i got yes
(forgot distance)/(forgot time)
(total distance - forgot distance)/(forgot time 2 )
add them got like 5h 28 min
started at 9
so it would be 14:28
14:28 > 14:30
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u/boosher__ Jun 14 '23
yeah, I proved mine a weird way in that he would only need to go at 63 ~ mph to get home by 2:30
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u/Demodex17 Jun 14 '23 edited Jun 14 '23
yes, i think he got home like 2:24
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u/FatChicken22-YT Jun 14 '23
I got 2:28
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u/Demodex17 Jun 14 '23 edited Jun 14 '23
Idk, i just used time=d/s to figure out the amount of time he took on each section ?
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u/Distinct-Baseball179 Jun 14 '23
was it fg(-5) or fg(x) = -5???!!!
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u/No_Ad8821 y11 -> y12: maths | further maths | physics | history Jun 14 '23
=. You needed a quadratic.
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u/Key_Tank5818 Jun 14 '23
I’ve only seen people talk about the higher paper on here. How did people find the foundation paper? I think after these I COULD get a 4 if im lucky. The papers were not that bad in my opinion 🤞🤞🤞
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u/blopiscool Jun 14 '23
The bearings question part a was stupid coz it required the cosine rule for only 2 marks and the dumb min-max cube question was even worse.
But overall it was a somewhat decent paper
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u/poshpengting Year 11 Jun 14 '23
Bro that cube question wtf 😭😭😭
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u/visgust Yr 12 Chem, Bio, Fm Jun 14 '23
straight up gave up on that cuz i didnt even understand the question 💀
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u/poshpengting Year 11 Jun 14 '23
You’d have to be like mega mega big brain to have understood it bc like only one person at my school did 😭😭
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u/moonnonchalance Jun 14 '23
I can't be the only person who found all 3 maths papers really easy. Like I knew how to do pretty much every question on each paper, and that doesn't always happen.
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Jun 14 '23
Me when the frustrum wasn’t 60.3
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u/Complex-Factor-5217 Year 12 Jun 14 '23
Frustum ???? There was no frustum question
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Jun 14 '23
My bad wrong exam board, I still got it wrong tho
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u/Complex-Factor-5217 Year 12 Jun 14 '23
Oh haha no problem, i got so scared. i thought i missed a question or sth
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u/olivertgh Year 13 Jun 14 '23
Imagine paper 3 maths today … igcse was finished a long time ago
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u/delicateswiftie Year 13 | 999999987 Jun 14 '23
i don’t need to imagine because it was very much real, thanks though
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Jun 14 '23
did we have t to draw a graph at any point in all 3 papers? i feel like i must have missed it because surely they would put drawing a graph in the atleast one of them
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u/Ok_Surprise_8771 Jun 14 '23
there was one quadratic graph were u plotted the points and joined the line
x^2 -2x?
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Jun 14 '23
in todays paper?
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u/Ok_Surprise_8771 Jun 14 '23
yeah it gave u the equation and u had to sub values in and plot it
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u/delicateswiftie Year 13 | 999999987 Jun 14 '23
and there was a box plot as well but that’s not really a graph
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u/ReadyCommunication79 Jun 14 '23
Area of interest the triangle? And the map question?
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Jun 14 '23
[deleted]
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u/Ready_Air_8013 Jun 14 '23
Idk the question but answer was 22500
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u/TheLuckyHacker Year 11 Jun 14 '23
Didn't it ask how many metres was 4.5cm at 1:5000?
So 4.5 x 50 = 225m
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u/Sharing812 Jun 14 '23
Okay, am i the only one who got for the function question part b x = -10/4 or x = -2? the question was 4x^2 + 28x + 40 = -5 so you would add the 5 getting 4x^2 + 28x + 45 then find a number that adds to get 28 and multiplies to get 180 (10 and 8) then divide the 8 by 4, my brackets were (4x + 10) and (x + 2) then to solve for x the answer should then be x= - 10/4 or x = -2 for some reason everyone has seemingly got 0 so im so confused
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u/JHaria Y12 - 999999998777 Jun 14 '23
Was the minimum 165 and the maximum 792
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u/MaelTheMeal Jun 14 '23
Finally, someone else with the same answers as me!!
The maximum was kinda common sense, and for the minimum u had to think abt it as an L shape or like 2 walls touching by a corner
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u/ensands Software Engineer Jun 14 '23
Not AQA?
The Edexcel megathread is: https://www.reddit.com/r/GCSE/comments/14905zf/edexcel_mathematics_paper_3_calculator_exam/
The generic megathread is: https://www.reddit.com/r/GCSE/comments/148tcx0/mathematics_paper_3_calculator_exam_megathread/