Mathematics: Post your doubts here!

[ahmadumar]

Thnx for the reply..but my question is different.Pls refer May/June 2001 paper 2 q11 b)

can u send the link for this paper

 

[Evangeline]

Many many thanks

 

[Awesome12]

Thanx a lot rele Jazak Allah Khair remeber me in ur duas

Wa iyyakum
You too remember me in your duas

 

[ahmadumar]

can anyone plz solve this one it is math 0580 may june 2008 v 21
plz solve part (b) it is question 21
thank you in advance
may Allah grant me and you an A*
View attachment 41265

 

[omar28744]

tyvm bro ur the best , gd luck in ur exams and carrier

 

[omar28744]

View attachment 41266

tyvm bro ur the best , gd luck in ur exams and carrier

 

[ahmadumar]

ahmadumar
Awesome12 View attachment 41273

 

[Akablack]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w13_qp_21.pdf
how do I solve question 11? i tried cross multiplication but the answer doesnt match the mark scheme.

 

[ahmadumar]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w13_qp_21.pdf
how do I solve question 11? i tried cross multiplication but the answer doesnt match the mark scheme.

did u change the units to make them same?

 

[Magnanimous!!!]

some one knows how to use the matrices and vectors in the fx-991es PLUS calculator??
plzz help

 

[ahmadumar]

can u plz answer in these situations after changing unit shoud we take the biggest value up or down

u have to put the scale value on the top.

 

[Magnanimous!!!]

u have to put the scale value on the top.

do u know how to use the matrices and vectors on the fx-991ES PLUS calculator?
If yes plzz help..
If no plzz let me know

 

[ahmadumar]

some one knows how to use the matrices and vectors in the fx-991es PLUS calculator??
plzz help

it would be a waste of time. but still u if u want, go ion youtube

 

[ahmadumar]

lol i mean the situation where we compare like small cone radius is this much and big cone is xxx one volume is given to us in that situation should we put th bigger value

if u put the radius of come on one side at top on the other side put the volume of the same radius at the top :3

 

[Xylferion]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w13_qp_21.pdf
how do I solve question 11? i tried cross multiplication but the answer doesnt match the mark scheme.

First of all look at the units. The model is in cm^3 while the full size is in m^3. Convert the cm^3 into m^3.

1 cm = 0.01 m
1 cm^3 = (0.01)^3 = 0.000001 m^3

1200 cm^3 = 1200 x 0.000001 m^3
1200 cm^3 = 0.0012 m^3

Now apply the similarity ratios. Since we're dealing with volume, the ratio should be cubed.

We know the ratio is 1 : n , so we can write it in the form 1 / n.

1 / n = volume of model / volume of the full sized plane

Since we're dealing with volume, the ratio should be cubed.

1^3 / n^3 = 0.0012 / 4050

0.0012 n^3 = 4050

n^3 = 4050 / 0.0012
n^3 = 3,375,000
n = ³√3,375,000
n = 150

That's all you have to do, hope this helped.

 

[ahmadumar]

ahmadumar
Awesome12
Xylferion
View attachment 41281
in mark scheme ans is 77 can u plz tell me why

less than 21 also includes 17 which is less than 8. Under less than 21 less than 8 also comes

 

[My Name]

View attachment 41250

i answered it then i saw u already did
and PS urs is neater picture than mine!

 

[Xylferion]

ahmadumar
Awesome12
Xylferion
View attachment 41281
in mark scheme ans is 77 can u plz tell me why

What he basically meant to say ^ is that all the prime numbers under 8 also fall under 21.

So 60 + 17 = 77

 

[Akablack]

did u change the units to make them same?

yeah i did but it turned out that i shouldve cubed the n.

 

[ahmadumar]

do u know how to use the matrices and vectors on the fx-991ES PLUS calculator?
If yes plzz help..
If no plzz let me know

http://community.casiocalc.org/topic/3534-how-to-make-matrix-multiplication-in-casio-fx-991es/
look it over here. i just tried it and it worked its easy steps