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Edexcel GCSE maths, give each other questions to do.

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Original post by Ano123
To be honest though that question was fine and perfectly ok to put in the paper. It should not have caused so many problems.


I personally disliked the wording when I first saw the question.

I know they use 'show that', but if they give an equation where you can easily find n, you can still 'show that' n^2-n-90 is equal to 0 by using the value of n - but that's what the second part of the question wanted you to do.

I prefer 'prove algebraically' for that.
(edited 7 years ago)
Original post by ScrewTheExams
Hopefully! I just want an easy paper like june 2010, or for me june 2014, or the easiest paper that I found - november 2014.

But to be honest, if we get a paper like june 2015 or even harder then the grade boundaries will be low again, so it might not be that hard to get an A*. 155 for A* was a joke last year, it honestly wasn't that hard to get that - there were only a small number of questions that were hard (if you revised).

Well, the papers have been made ages ago, so all we can do is hope for the best! :biggrin:

Good luck to you. :biggrin:


Good luck to you too my friend! Yeah, I really hope the grade boundaries were as low as they were last year.
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Ano123
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Original post by ScrewTheExams
I personally disliked the wording when I first saw the question.

I know they use 'show that', but if they give an equation where you can easily find n, you can still 'show that' n^2-n-90 is equal to 0 by using the value of n - but that's what the second part of the question wanted you to do.

I prefer 'prove algebraically' for that.


I'm not sure I know what you mean. Care to elaborate?
Original post by Ano123
I'm not sure I know what you mean. Care to elaborate?


The question said: Show that n^2-n-90 = 0

You can 'show that' n^2-n-90 equals 0 by finding n, which is easy to find in this case so it seems reasonable to do that, n is 10; so 10^2-10-90=0

But they wanted us to do it algebraically, so why not say 'Prove algebraically that n^2-n-90=0' or similar. 'Show that' would have been okay if n was a decimal and not a whole number, so you HAVE to use algebra in that case - but they decided to word it like that for the first question that they ever done that mixed this type of algebra with probability, where you can easily find n and show it that way.
(edited 7 years ago)
Reply 84
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Ano123
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Original post by ScrewTheExams
The question said: Show that n^2-n-90 = 0

You can 'show that' n^2-n-90 equals 0 by finding n, which is easy to find in this case so it seems reasonable to do that, n is 10; so 10^2-10-90=0

But they wanted us to do it algebraically, so why not say 'Prove algebraically that n^2-n-90=0' or similar. 'Show that' would have been okay if n was a decimal and not a whole number, so you HAVE to use algebra in that case - but they decided to word it like that for the first question that they ever done that mixed this type of algebra with probability, where you can easily find n and show it that way.


The question was fine. They gave you a situation with probability including a variable n, and they asked you to show n^2-n-90=0. There is really only one way to do it, the correct way.
Original post by Ano123
The question was fine. They gave you a situation with probability including a variable n, and they asked you to show n^2-n-90=0. There is really only one way to do it, the correct way.


It's fine for me now, that I know that they use 'show that' for those questions, but I wasn't too sure a year ago when I first saw it.
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Ano123
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Original post by ScrewTheExams
It's fine for me now, that I know that they use 'show that' for those questions, but I wasn't too sure a year ago when I first saw it.


What did you think when you first saw it?
Original post by Ano123
What did you think when you first saw it?


That you had to find n (which is 10) and show it that way, until I saw part (b) of the question that wanted you to do that - then it came to mind that it's algebra related - or that it's a messed up question :biggrin:.
(edited 7 years ago)
Original post by Ano123
What did you think when you first saw it?


Lol one of my friends that got an A* last year in maths, he got around 92 marks on the first paper, he wrote the answer to the hannah sweets question in terms of pi π, idk how xD :biggrin:
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Ano123
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Original post by ScrewTheExams
That you had to find n (which is 10) and show it that way, until I saw part (b) of the question that wanted you to do that - then it came to mind that it's algebra related - or that it's a messed up question :biggrin:.


I think, with all due respect, it was more a lack of understanding on your part if you didn't know what to do, as you say you know what to do for these types of questions now.
Original post by _Xenon_
I love probability, haha and it's a very common question! :-)
I did loads of practice of these questions and the topics which I lost marks on. Now I'm feeling confident. :wink:

I wish a 5 marker or 6 marker comes up on the paper, that would be amazing! They're worth so many marks as they usually involve a lot of steps and you got to avoid little mistake some people tend to make and then use something like the quadratic formula later on in the question...

I'm hoping for algebraic fractions which require using quadratic formula too, worth nice amount of marks and isn't bad at all. :biggrin:

When is your maths exam? Mine is next week Thursday iirc. Good luck! :smile:


Do you have any questions? or booklets i could try? lol i can barely do tree diagrams, nah i can do everything but i dont like when it gives you like 4000 options you have to times together
Any predictions ?


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Original post by chrlhyms
Do you have any questions? or booklets i could try? lol i can barely do tree diagrams, nah i can do everything but i dont like when it gives you like 4000 options you have to times together


For probability & tree diagrams: http://www.mathsgenie.co.uk/resources/92_tree-diagrams.pdf

These are A* questions for Edexcel GCSE but he charges for the solutions. :/
1H http://bland.in/a_star1h_new2.pdf
2H http://bland.in/a_star2h_new2.pdf

http://saveyourexams.co.uk/ is a site I use but you'll have to register and the edexcel GCSE maths doesn't have the question papers yet, however it does have the edexcel IGCSE maths questions + solutions by topic.
:smile:
(edited 7 years ago)
Original post by _Xenon_
For probability & tree diagrams: http://www.mathsgenie.co.uk/resources/92_tree-diagrams.pdf

These are A* questions for Edexcel GCSE but he charges for the solutions. :/
1H http://bland.in/a_star1h_new2.pdf
2H http://bland.in/a_star2h_new2.pdf


You're a star! thank you, do you have any others like Hannah's Sweets probability that type of hardness
(2−3x2−2)2=210\left(\dfrac{2^{-3x}}{2^{-2}}\right)^2=2^{10}

find x
Original post by chrlhyms
You're a star! thank you, do you have any others like Hannah's Sweets probability that type of hardness


I'll have a look. :smile:
Original post by _Xenon_
I'll have a look. :smile:


Do you have the answers to the A* topics or any of the Bland.in websites answers?
Original post by chrlhyms
You're a star! thank you, do you have any others like Hannah's Sweets probability that type of hardness


I think you'll like this website, got demon questions and predicted papers etc. which can be done ONLINE. :smile:

http://onmaths.com/mock_exams/?archiveType=demon

:smile:
Original post by SmallTown
Do you have the answers to the A* topics or any of the Bland.in websites answers?


Not for the bland.in website I don't, sorry.
I am doing the Edexcel IGCSE exam so I've spent money on resources for that. :-)
Original post by _Xenon_
I think you'll like this website, got demon questions and predicted papers etc. which can be done ONLINE. :smile:

http://onmaths.com/mock_exams/?archiveType=demon

:smile:


thank you so much!!!

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