IGCSE/GCSE/O & A Level/IB/University Student Forum
Qualification => Subject Doubts => IGCSE/ GCSE => Math => Topic started by: emi on May 16, 2009, 04:27:52 am
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can any one solve Question 1 from SP 4 ? and tell me how you did it ? please
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can any one solve Question 1 from SP 4 ? and tell me how you did it ? please
ok, 20,000,000 cm/ 100 (to get cm-m) ==== 200,000m
200,000 m/ 1000 (to get m-km) ===== 200km
200km x 12 = 2400km
OR 20,000,000 x 12 = 240,000,000
240,000,000 / 100 = 2,400,000
2,400,000 / 1000 = 2400km
Done 8)
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This is also one of the hardest p4s ive ever done so hopefully it isnt that hard on monday :(
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will the exam on monday be like the same format of the specimen paper ??
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yup . it wil b d same..u hve to write in d paper itself evn d graphs.
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yeah... it shud be ...
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yup . it wil b d same..u hve to write in d paper itself evn d graphs.
so that will make the exam kind off easiar right ?
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inshallah !! :D
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yup...
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how could i get specimen p4 ? ::)
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how could i get specimen p4 ? ::)
http://www.cie.org.uk/qualifications/academic/middlesec/igcse/subject?assdef_id=872
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is linear programing likely to cum in p4 as it hs cum in p2????
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is linear programing likely to cum in p4 as it hs cum in p2????
no not really, i think we should concentrate on the following:
1. Probability (tree diagrams etc.)
2. Handling data (interquartile range, cumulative frequency etc.)
3. Trigonometry (Bearings, Pythagoras theorm, angles of elavation, sine and cosine curves etc.)
4. Angle properteis
5. Indicies
6. Graphs of functions
7. Functions
8. Straight line graphs
9. Inequalities, quadratic formula, quadratic equations etc.
10. Factorising and expanding brackets (algebraic presentation amd manipulation)
11. Graphs in practical methods
12. Percentages
13. Transformations (shear and stretch etc.)
14. sequences and the nth term
15. mensuration (area and volume of a cuboid, parallelogram, circumference of a circle etc.)
i attached the topics that came in paper 2 (these are the ones that are unlikeley comming in the P4 according to my math teacher)
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Thanks such a great list!!!
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what about the rest of the Questions on page 2 D:
Q1 all parts
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please help some one ,, i just want the first page
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Whatever u do, dont draw your graphs in pen. I knw its obvious, but once your in da exam u seem to forget as your so focused on solving da questions.
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can any one solve Question 1 from SP 4 ? and tell me how you did it ? please
ok, 20,000,000 cm/ 100 (to get cm-m) ==== 200,000m
200,000 m/ 1000 (to get m-km) ===== 200km
200km x 12 = 2400km
OR 20,000,000 x 12 = 240,000,000
240,000,000 / 100 = 2,400,000
2,400,000 / 1000 = 2400km
Done 8)
lol sorry i forgot to finish the rest of it, anyway.
1 ii) 13x(20,000,000)^2 / 100,000^2 = 520,000km squared.
b i) 1580/31.6 = 1/n = 50, 50 x 100 x 1000 = 5,000,000 ( because answer needs to be in cm )
b ii) 1155 to 1403 = 128 minutes
S=D/T 1580/128 = 12.343...
12.343... x 60 = 741 km/h
NOW ITS DONE ;D
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Hey, could someone please help me with number 8? : )
And how do you rotate about a centre, and how do you reflect about a line? :S
Thanks!
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Hey, could someone please help me with number 8? : )
And how do you rotate about a centre, and how do you reflect about a line? :S
Thanks!
8. a) 1.2 x 0.3 x 3 x 60 = 64.8
b) 1.2 x 0.8 x 15 x 60 = 864
864-64.8=799.2
799.2/ 64.8 = 1233%
c) (( (pie) x r^2 x h )) - (( (pie) x r^2 x (h-0.0013) = 2 )) {0.0013 = metres}
cancel out to get, (pie) r^2 x 0.0013 = 2
make R the subject, 2/0.0013 x (pie) = something and square root it to get 22.13m
d) 50.40 / 0.12 = 420m^2 - surface area,
420 = 0.8x +1.2x + 0.8x = 420= 2.8x x = 150m
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Hey, could someone please help me with number 8? : )
And how do you rotate about a centre, and how do you reflect about a line? :S
Thanks!
umm hard to explain the rotation and reflection part, but imagine u have a point at 2,1 and u rotate it 90 degrees clockwise, the point will be at 1,2 ( i think tracing paper is allowed in the exam and will help alot)
and how dont u know reflections ? :S
imagine u have a line thats at 2,4 to 4,4
and its 4 lines above the X axis/line to reflect that u go down 4 lines and u get the reflection at 2,-4 to 4,-4
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Thanks. I get the direct reflections/rotations. You wouldn't happen to hav November 2001?
If not the question goes like this:
The coordinates of P, Q and R are (4,2), (6,2) and (8,4) respectively,
The points Q and R lie on the line l.
a- find the new coordinates for
i- P, after reflection in the line l,
iii- R, after the rotation of 90 degrees anticlockwise about centre P.
i don't get how to rotate about a centre (in this case P) and how to reflect about a line (apart from the x-axis/ y-axis).
I'm sorry, they're probably really easy but I can't seem to find the formulae. :-\
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Thanks. I get the direct reflections/rotations. You wouldn't happen to hav November 2001?
If not the question goes like this:
The coordinates of P, Q and R are (4,2), (6,2) and (8,4) respectively,
The points Q and R lie on the line l.
a- find the new coordinates for
i- P, after reflection in the line l,
iii- R, after the rotation of 90 degrees anticlockwise about centre P.
i don't get how to rotate about a centre (in this case P) and how to reflect about a line (apart from the x-axis/ y-axis).
I'm sorry, they're probably really easy but I can't seem to find the formulae. :-\
thres no formulas needed, unfortuanetly i need to see the graph to help cuz i dont know whats meant be line l
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howd you guys calculated the 128 minutes?im not good at time..