Mr M&#x27;s OCR (not OCR MEI) Core 2 Answers 18th January 2013

Thanks a lot!

Looks like I've lost 5 marks :biggrin:

(edited 11 years ago)

Reply 2

ben494

Thanks very much!

Has anyone sent you a c4 paper yet?

Reply 3

Thanks a lot sir!

How would you judge the difficulty of the paper, from an expert-teaching point of view? :wink:

OP

Original post by ben494

Thanks very much!

Has anyone sent you a c4 paper yet?

Unfortunately not.

Reply 5

Lilhazzaman

7

Think I got around 55; any ideas on what that will be as a grade? :smile:

OP

Original post by abzy1234

Thanks a lot sir!

How would you judge the difficulty of the paper, from an expert-teaching point of view? :wink:

This is going to sound mighty big-headed but it all seems easy to me so I'm probably not the best person to judge.

There were a couple of twists that might have thrown some candidates.

OP

Original post by Lilhazzaman

Think I got around 55; any ideas on what that will be as a grade? :smile:

Probably a high B.

Reply 8

Original post by Lilhazzaman

Think I got around 55; any ideas on what that will be as a grade? :smile:

Obviously i'm just a year 12 and probably know very little but that would probably be a B, unless the grade boundaries will go as low as 55 for an A.

Reply 9

Lstigant

Why is 6ii 64?? I got r=3/4 so 8/(1-3/4)=32

Reply 10

Original post by Mr M

This is going to sound mighty big-headed but it all seems easy to me so I'm probably not the best person to judge.

There were a couple of twists that might have thrown some candidates.

Looking back at the paper, I can agree with you slightly. But parts of questions 6,7, 8 and 9 all had some tricky elements which would throw a lot of candidates off wouldn't it?

You have to admit, compared to past papers, this one had greater potential to throw off candidates :tongue:

OP

Original post by Lstigant

Why is 6ii 64?? I got r=3/4 so 8/(1-3/4)=32

a=16 not 8. The G.P. was 16, 12, 9 ...

Reply 12

Original post by Lstigant

Why is 6ii 64?? I got r=3/4 so 8/(1-3/4)=32

S_infinity= a / 1-r

= 16 / 0.25

= 64

A = 2x, not x :P

Reply 13

Original post by abzy1234

Looking back at the paper, I can agree with you slightly. But parts of questions 6,7, 8 and 9 all had some tricky elements which would throw a lot of candidates off wouldn't it?

You have to admit, compared to past papers, this one had greater potential to throw off candidates :tongue:

Yeah it was definitely harder than any OCR past paper that I did!

Reply 14

Lstigant

Original post by stirkee

S_infinity= a / 1-r

= 16 / 0.25

= 64

A = 2x, not x :P

Ahh of course thanks :smile:

, I suppose I can live with losing a mark

Reply 15

JASApplications

Thanks very much!

For 8iv I did:

log₂(x-3) - log₂x = 4
log₂(x-3)/x = 4
(x-3)/x = 2^4
(x-3)/x = 16
(x-3) = 16x
-1/5 = x
-1/5 = c

Reckon I'd get a few method marks even though the final answer is most likely wrong?

Reply 16

Original post by Lstigant

Ahh of course thanks :smile:

, I suppose I can live with losing a mark

Is that the only mark you lost :O

OP

Original post by abzy1234

You have to admit, compared to past papers, this one had greater potential to throw off candidates :tongue:

There was some odd stuff there but I don't think any of it was particularly hard just unfamiliar. This might have put off people who did lots of past papers but didn't know the content of the specification all that well.

Reply 18

Original post by stirkee

Yeah it was definitely harder than any OCR past paper that I did!

Yup. I averaged around 62 after doing 15 past papers. Now after today, I think I picked up around 40-44 marks :frown:

Guess it's the exam pressure or that I can't apply my maths fully enough!

Oh well! Well done to you for smashing it :biggrin:

Reply 19