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# UNOFFICIAL MARKSCHEME Edexcel Maths Calculator paper 09/06/2016

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1. What did you guys get for the quadratic formulae?

I got something like 0.(something) and -1.(something)
2. The trolley question was 3, the trigonometry one was 30.1, 23 was 1/-3x-4, last one was 80.4
3. (Original post by bethanyjx)
I got different to everyone for the quadratic formula... did anyone get -2.29 and 0. something ????
i got -2.29 and 0.29
4. (Original post by Anygy)
The non calc went a looooot better hope that boosts my grade. Think I'll get an A with around 65 on each??
Yeah that's almost certainly an A
5. 80.4 on the last question refs
6. (Original post by zeldor711)
If you divided by 5.2 at the in the bracket you get 80.4, if you divided by 5.22 you get 80.1

I divided by the whole thing 5.xxxxxxxxxx what ever it was
7. (Original post by bigmanlikemeee)
x³-5x= 3.8 is wrong or nAH
Sorry but it's wrong, the answer was 3.7
8. (Original post by epage)
For the trial and improvement one my few ids were saying they got 3.7 but I got 3.8 and I was 100% sure that was right?

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I got 3.8 too ??
9. (Original post by Waveyalex)
Perimeter was 10.25
i got 9.25
10. (Original post by GCSE DEMOLISHER)
The last question was 100% 80.4 degrees. You had to re-arrange half absinC to get 18cm2 divided by half x 7 x 8. With the number you get, use inverse sine. This gives you the angle between the 2 lengths. As you have an angle between 2 lengths, you can use cosine rule to find the final length. The length squared = 7^2 + 8^2 - 2 x 7 x 8 x cos (the angle got from before). Square root this answer to give you the final length of the triangle. Once you have all 3 lengths, you can then re-arrange the cosine rule to find the final angle (not given on the formula sheet). Do 7^2 + (length acquired just now)^2 - 8^2 divided by 2 x 7 x (length acquired just now) gives you cos of the angle they asked you to find. Do inverse cos on this number and you get 80.4 which looked very similar to the angle given. Who else did this for the last question?
I got 80.4 degrees but I don't remember using negative reciprocal of cos...
11. (Original post by ScrewTheExams)
I got like 16. something for the normal trig question :/

and 80.3 for last one
The first trig one was 30.1 degrees, the question asked you to round it to 3 sig figs
12. (Original post by CaSweeney)
Sorry but it's wrong, the answer was 3.7
No, its 3.8.
13. what was 23????
14. (Original post by CaSweeney)
I got 3.7

The question asked you to work out the closest value that 'x' could be (to1 decimal place) if ("x cubed" - (5 multiplied by 'x' = 34

If you sub 3.7 into that equation you will get an answer of 32.153
If you sub 3.8 into that equation you will get an answer of 35.872

To then work out which is closest you had to work out the difference between each answer and 34.

For 3.7:
34 - 32.153 = 1.847

For 3.8:
35.872 - 34 = 1.872

Seeing as 1.847 is a smaller number than 1.872, it means that 3.7 is the closest value of 'x' to 1 decimal place
Nope.

what you do is make x= 3.75 and if it is below 34, which it was you round the number up as you know that x is larger than 3.75 but lower than 3.8. any number above 3.75 rounds up to 3.8.

Because there is a smaller difference it does not mean that it is right as the difference is smaller as it does not increase at a constant rate. the number increases increasingly.

15. (Original post by CaSweeney)
Sorry but it's wrong, the answer was 3.7

Because 3.74 was too small, and 3.75 was too small, so 3.75 onwards rounds to 3.8 (1dp)
16. (Original post by CaSweeney)
Sorry but it's wrong, the answer was 3.7
Do you get working marks if you got the answer wrong ? I can't remember what I got for that.

⚔🛡⚔~Nothing happens to anyone that he is not fitted by nature to bear - Maximus Decimus Meridius~⚔🛡⚔
17. (Original post by ellamoon_22)
It was 9.25 shes right
Yes - as it was (4+9.25)+(4+9.25)+9.25+9.25=45
18. (Original post by ScrewTheExams)
I divided by the whole thing 5.xxxxxxxxxx what ever it was
They'll probably accept all answers from 8.1 - 8.4.
19. (Original post by CaeciliusScribit)
I got 3.8 too ??
3.7 was closer
20. (Original post by ameenatariq)
What do you guys think the grade boundary will be for an A*?!
160/165?

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