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Maths igcse paper 4

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1. i had paper 42 and it went awsum 4 me, it was easier than i expected it to be how was urs btw
2. Yea i did that one asweell, also thought it was easier than paper 22
3. (Original post by simivb)
Yea i did that one asweell, also thought it was easier than paper 22
What did u get as the area of the logo i got about 9990 cm3
4. (Original post by Rohit_Rocks10)
What did u get as the area of the logo i got about 9990 cm3
i dont remember exactly but i remember some working for the circle i used:
1-pi *8^2 * 210/360 or something
2&3-area of triangle(1/2 *a*b*sinC)
5. (Original post by Rohit_Rocks10)
What did u get as the area of the logo i got about 9990 cm3
9900 ?
6. (Original post by Abdullah IGCSE)
9900 ?
Ya it was just a guess but i got the same step as you said
7. (Original post by Abdullah IGCSE)
9900 ?
8. 194 if i remember...
9. (Original post by Abdullah IGCSE)
194 if i remember...
I did the area of the sector so
and then used the 1/2 x a x b x sinc formula for the two triangles

10. (Original post by simivb)
I did the area of the sector so
and then used the 1/2 x a x b x sinc formula for the two triangles

thats correct simvib for the last one i wasn't sure i thought 4 was k so i got k^2 then i multiplied the area from the earlier part by it but im not sure on that part.
11. Hahaha great!
I mean the last question of the whole paper
did the length of the line = 18.97 or something?
And the line of the perpendicular bisector y=-1/3x+4.33
12. (Original post by simivb)
Hahaha great!
I mean the last question of the whole paper
did the length of the line = 18.97 or something?
And the line of the perpendicular bisector y=-1/3x+4.33
yes i rounded it to 3 s.f so 19 and the perpendicular bisector i did the same thing so i think im right..
13. (Original post by simivb)
Hahaha great!
I mean the last question of the whole paper
did the length of the line = 18.97 or something?
And the line of the perpendicular bisector y=-1/3x+4.33
for the 2 questions before sine rule was involved yeah? and for the mr chan thingy he travelled 1000ish or near that.
14. (Original post by simivb)
Hahaha great!
I mean the last question of the whole paper
did the length of the line = 18.97 or something?
And the line of the perpendicular bisector y=-1/3x+4.33
I think my answer involved whole integers...I went back to the question with the graph and plotted the lines on there to see if my answers looked right. Do you guys think the grade thresholds will be quite high as it was easy? How did you find it?
15. (Original post by Abdullah IGCSE)
for the 2 questions before sine rule was involved yeah? and for the mr chan thingy he travelled 1000ish or near that.
there was a question on pythagoras, then the cos rule and then the sine rule, but i think you could have just done 180- two other angles but it was worth 3 marks ,so i used sine as well
The mr Chang about 1100 litres, something strange
16. (Original post by wannabeboarder)
I think my answer involved whole integers...I went back to the question with the graph and plotted the lines on there to see if my answers looked right. Do you guys think the grade thresholds will be quite high as it was easy? How did you find it?
Probably, it was quite simple
17. (Original post by simivb)
there was a question on pythagoras, then the cos rule and then the sine rule, but i think you could have just done 180- two other angles but it was worth 3 marks ,so i used sine as well
The mr Chang about 1100 litres, something strange
cosine rule? i didnt use cosine rule in the exam.. and i dont remember 1100 litres. did you add the insurance to the daily price?
18. (Original post by wannabeboarder)
I think my answer involved whole integers...I went back to the question with the graph and plotted the lines on there to see if my answers looked right. Do you guys think the grade thresholds will be quite high as it was easy? How did you find it?
I personally think the grade boundary on paper 4 would be about 100 for an A or something like that mean while paper 2 about 49 or 51 for an A
19. (Original post by Abdullah IGCSE)
cosine rule? i didnt use cosine rule in the exam.. and i dont remember 1100 litres. did you add the insurance to the daily price?
I think you could have used the sine or cosine, but it was four marks, so i used the cosine
adn to the mr chang thing it was one thousand something, I just don't remember what, but yes i did add all of it.

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