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# GCSE Maths Edexcel Calculator Paper - Exchange your help! - 09/06/16 watch

1. Mathswatch are streaming their videos on youtube after it kept crashing before paper one.
So even if your school doesn't have access you can now, they are useful.
2. (Original post by B3ASTy)
John invested £2500 for 2 years in a savings account.
He was paid 3% per annum compound interest.

How much did John have in his savings account after 2 years? REMEMBER THE EQUATION FOR THIS ONE.
£2652.25
3. (Original post by gabsdl)
i think so...
someone sent me a mark scheme for this so i now know 100% it's right https://www.flickr.com/photos/142557...3140/lightbox/
4. (Original post by B3ASTy)
someone sent me a mark scheme for this so i now know 100% it's right https://www.flickr.com/photos/142557...3140/lightbox/
ah that's good, wasn't 100% sure sorry
5. (Original post by B3ASTy)
John invested £2500 for 2 years in a savings account.
He was paid 3% per annum compound interest.

How much did John have in his savings account after 2 years? REMEMBER THE EQUATION FOR THIS ONE.
What's the equation?
6. (Original post by hafsa473)
What's the equation?
His final amount= original amount x multiplier^years
7. (Original post by hafsa473)
What's the equation?
so final amount= 2500 x 1.032
8. (Original post by B3ASTy)
Prove that (5n+1)^2 - (5n-1)^2 is an even number, for all positive integer values of n.
Wait, this is a GCSE maths paper?! We do proof by induction in the further maths pure AS module!
9. (Original post by B3ASTy)
so final amount= 2500 x 1.032
Oh ok I forgot so thanks
10. (Original post by goatygoat)
Wait, this is a GCSE maths paper?! We do proof by induction in the further maths pure AS module!
That specific question is in the pixl predicted paper
11. (Original post by B3ASTy)
That specific question is in the pixl predicted paper
Oh okay, so it must like an extension paper then?. Honestly though, if you can prove that without being taught it in class (I don't know if the syllabus has changed since I've done it) then you're a G at maths dawg.
12. (Original post by B3ASTy)
Prove that (5n+1)^2 - (5n-1)^2 is an even number, for all positive integer values of n.
13. (Original post by superjay39)

Thanks for this, it seems easier than it first looks!
14. To do this;

Ac^2 = 5^2+3^2
Ac^2 = 25+9
AC^2 = √34
-------------------
Tan(x) = 5/3
x = Tan^-1 (5/3)
= 59.03624347°
sin (59.0) = opp(80)/3

BD= 3sin (59.0)
=2.57247877

PM for more I AM SOO SCARED FOR TOMORROW AIMING FOR A* xD
15. How would I do this question?
16. (Original post by hafsa473)
How would I do this question?

Sector
40/360 x π (8)^2
=22.34021443cm^2

Triangle
1/2(8)(8)sin40
=20.56920351cm^2

Shaded Area = Sector - Triangle = 1.7710109cm^2 = 1.77 (3sf)
17. solve 3x^2-5x-1=0
give your solutions correct to 3 significant figures

I know it's easy, but I don't want to give you hard questions to stress you out before tomorrow haha
18. (Original post by Marshall Taylor)
solve 3x^2-5x-1=0
give your solutions correct to 3 significant figures

I know it's easy, but I don't want to give you hard questions to stress you out before tomorrow haha
Quadratic formula, punch your numbers in, watch for minuses and then get your two answers. I would give the actual answer but I really can't be bothered to get my calculator.
19. Anyone wanna have a go at this?
20. (Original post by B3ASTy)
Thanks for this, it seems easier than it first looks!
no it is 20n which you need to factorise to give you 2(10n)

i answered the question when you first posted it, i am not sure if you saw it

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