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OCR Core 1 Mathematics

RedDevils

im hoping for 100 lol, so far i dont think i have anything wrong but i really rushed 5-7 lol so myt of made a silly mistake

I think you said you got 2 for the y coord on Q8. It should be 4, I made the same mistake :frown:

Reply 101

Glutamic Acid

17

!MEna

I'll be happy with 90+, I'm not too bothered about getting full UMS. I must say though, most people at my school said they found the paper significantly harder than any of the past papers they've done, especially the 2007 series so I've got a feeling the grade boundaries will be lower than last year's if anything.

Yes, 90+ probably would suffice, but ideally I'd like over 95% for AS Maths and Further Maths, so getting a high mark in this would help. I also heard quite a few people saying it was very hard, especially the last question.

Reply 102

Salinger

1

from all past papers i done (about 7) that seemed the hardest, might have being due to exam pressure or i don't know...

heres some answers i put down, that i remember off top of head:-

1) 6 + 2root5

2) i) x^2 + y^2 = 49
ii) radios = root64 = 8

3) a = 2, b = 18, c = -17

4) i) p = -1
ii) k = 3
iii) t = 8

5) i) x^3 + 2, transformation of x^3, just move 2 up
ii) just rootx, but like 2 bigger
iii) i put scale factor 1.5, from x axis in y direction :confused:

6) i) -4 +/- root 6
ii) therefore, -4 + root 6 greater than or equal to zero???
-4 - root 6 greater than or equal to zero???
as both where on negative side of axis.

7) i) gradient = -1/2

other questions, cant remember number etc.

stationary points, i got to be
(-1,4) and (1/3, 155/54) i think the 155/54 wrong because i foolishly put 1/3 squared as 1/6 :angry:

@@@@@@@@

perpendicular - was NOT perpendicular as gradients multiplied = -1/2, and not -1

last q, double deffrentiated
part 2, i should have ****ing noticed it was hidden quadratic :eek:

i tried to solve by
-9 = 8x^3 + 1/x^3
-729 = 8x^6 + 1
- 728 = 8x^6
-91 = x^6
-x = sixth route of 91
ahhhhhhh 5 marks lost already + silly mistakes

i hope grade boundaries are low, from few ppl i talked to they said its hard so hopefully lots of people ****ed up haha

Reply 103

The Formidable Tani

How many marks were available for the last part of question 7, where you had to find whether AC and BC were perpendicular to each other? I got -1/2 and 1/3 as my gradients, but that last one looks like it should've been 3 - woops. I think I should only lose one mark for it, because I'm pretty sure that my working was right for it, and I concluded that it wasn't perpendicular.

Reply 104

RedDevils

OP

3

glutamic acid, you have the question paper yeah??

Can you tell me the two points of the one where u had to write the equation of AB. Thanks

Reply 105

Glutamic Acid

17

RedDevils

glutamic acid, you have the question paper yeah??

Can you tell me the two points of the one where u had to write the equation of AB. Thanks

A(-5, -2) B(3, 1)

Reply 106

.Adrian.

these posts sare very ineresting to read

Reply 107

RedDevils

OP

3

Glutamic Acid

A(-5, -2) B(3, 1)

Thanks a bunch :biggrin:

Reply 108

RedDevils

OP

3

Glutamic Acid

I think you said you got 2 for the y coord on Q8. It should be 4, I made the same mistake :frown:

nah i got 4 lol i ment 2 and 22/27 as in (2 and 22/27 AKA 76/27) lol

Reply 109

Zwarovski

Phew!

Well I thought that it went really badly at the time when I was getting stuff like 76/27 and all the other weird numbers, but this thread has made me feel a lot better.

Also my friends got the same too.

Some stuff I can remember: (in no particular order)

-Near the end, the lines were not perpendicular

-Q3 a=3, b=18, c=-17

-The last question was a quadratic in disguise (substitute for x^3)

-I got -4+/-root6 for one of the earlier ones where you had to sketch the graph that went through (0,10) so both roots were on the -ve x axis Was the quadratic on the last part of this question asking for greater than or less than zero?

-Q8 Stationary points were (-1,4) (max) and (1/2,76/27) (min) x is a decreasing value in between the two.

I was hoping before the exam to finish in the high 90's, if I don't than I, just like everyone else, have no one to blame other than myself; although I felt my prep was adequate.

After reading this thread, that high score seems quite possible :cool:

(cautious woo!!)

Zwarovski.

Reply 110

r_patel91

2

Zwarovski

Phew!

Well I thought that it went really badly at the time when I was getting stuff like 76/27 and all the other weird numbers, but this thread has made me feel a lot better.

Also my friends got the same too.

Some stuff I can remember: (in no particular order)

-Near the end, the lines were not perpendicular

-Q3 a=3, b=18, c=-17

-The last question was a quadratic in disguise (substitute for x^3)

-I got -4+/-root6 for one of the earlier ones where you had to sketch the graph that went through (0,10) so both roots were on the -ve x axis Was the quadratic on the last part of this question asking for greater than or less than zero?

-Q8 Stationary points were (-1,4) (max) and (1/2,76/27) (min) x is a decreasing value in between the two.

I was hoping before the exam to finish in the high 90's, if I don't than I, just like everyone else, have no one to blame other than myself; although I felt my prep was adequate.

After reading this thread, that high score seems quite possible :cool:

(cautious woo!!)

Zwarovski.

i think it was asking for greater than zero

good good

I will type in the answers tomorrow - I forgot to bring them home with me tonight! I have posted C2 answers and will post M2 answers later on other threads.

Reply 113

fishandchips

What was the question worth two marks where they asked something like what are the values of x which when applied makes the equation decrease as x increases or something crazy like that?
I've already lost 7 marks :frown:

Reply 114

r_patel91

2

ohh ye it was the one after you find which one is the minimum and maximum..x

Reply 115

deathrow

1

what was the answer to the simultaneous equation?
i got something like
4x^2 - 18x + 21 or something
the thing doesnt factorise and when i used the quadratic equation it came out with bull **** fractions, just like every other question
why cant they just have on question that just uses whole numbers

Reply 116

.Adrian.

aint that one something like -1<=x<=1/3

<= means equal to as well

Reply 117

r_patel91

2

deathrow

what was the answer to the simultaneous equation?
i got something like
4x^2 - 18x + 21 or something
the thing doesnt factorise and when i used the quadratic equation it came out with bull **** fractions, just like every other question
why cant they just have on question that just uses whole numbers