krisshP
Badges: 14
Rep:
?
#1
Report Thread starter 6 years ago
#1
http://examsolutions.net/a-level-mat...uary/paper.php

See q2b and the corresponding mark scheme for this question part.

I did this

(1/2)(2)(8) + 8T + (1/2)[75-(T+5)](8)=500

20 + 8T + 4(70-T)=500

...

T=50s

The mark scheme used the trapezium method to get area, but I used a different method and still got the right answer. So do I get full marks still? Aren't the A2 methods there for the method which is right or what:confused:?

Also, for the same paper, see q6d. Would 3.97m (3SF) be okay?

Thanks
0
reply
krisshP
Badges: 14
Rep:
?
#2
Report Thread starter 6 years ago
#2
Also, in general for M1 past papers, I'm guessing no marks are given for your diagrams, right?

Also, I tend to see, for example, this

20cos30° = T cos60° M1 A2, in MS

but I'd write down, 20cos30 - Tcos60 = 0 instead, I'm guessing this is still okay, right?

Thanks, better to be safe than sorry.
0
reply
krisshP
Badges: 14
Rep:
?
#3
Report Thread starter 6 years ago
#3
Bump
0
reply
krisshP
Badges: 14
Rep:
?
#4
Report Thread starter 6 years ago
#4
bump pleaseeeeee
0
reply
LilacLily
Badges: 11
Rep:
?
#5
Report 6 years ago
#5
(Original post by krisshP)
http://examsolutions.net/a-level-mat...uary/paper.php

See q2b and the corresponding mark scheme for this question part.

I did this

(1/2)(2)(8) + 8T + (1/2)[75-(T+5)](8)=500

20 + 8T + 4(70-T)=500

...

T=50s

The mark scheme used the trapezium method to get area, but I used a different method and still got the right answer. So do I get full marks still? Aren't the A2 methods there for the method which is right or what:confused:?

Also, for the same paper, see q6d. Would 3.97m (3SF) be okay?

Thanks
You would still get full marks. You have just divided the trapezium into a 2 triangles and a square. If it makes sense and if you clearly show the working then you would still get the method marks.

I'm not sure whether they would accept 3.97. I've always thought that the number of S.F must be less than or equal to the least accurate figure given.
0
reply
LilacLily
Badges: 11
Rep:
?
#6
Report 6 years ago
#6
(Original post by krisshP)
Also, in general for M1 past papers, I'm guessing no marks are given for your diagrams, right?

Also, I tend to see, for example, this

20cos30° = T cos60° M1 A2, in MS

but I'd write down, 20cos30 - Tcos60 = 0 instead, I'm guessing this is still okay, right?

Thanks, better to be safe than sorry.
This is perfectly fine. It's the same thing.
0
reply
krisshP
Badges: 14
Rep:
?
#7
Report Thread starter 6 years ago
#7
(Original post by LilacLily)
You would still get full marks. You have just divided the trapezium into a 2 triangles and a square. If it makes sense and if you clearly show the working then you would still get the method marks.

I'm not sure whether they would accept 3.97. I've always thought that the number of S.F must be less than or equal to the least accurate figure given.
So I shouldn't round to 3 SF and do that rounding method, right? Doesn't it say at the front of each M1 paper that if unsure round to 3SF, so 3SF is okay? This is so confusing.

(Original post by LilacLily)
This is perfectly fine. It's the same thing.
OK thanks again
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

Have you experienced financial difficulties as a student due to Covid-19?

Yes, I have really struggled financially (53)
17.21%
I have experienced some financial difficulties (88)
28.57%
I haven't experienced any financial difficulties and things have stayed the same (117)
37.99%
I have had better financial opportunities as a result of the pandemic (40)
12.99%
I've had another experience (let us know in the thread!) (10)
3.25%

Watched Threads

View All
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise