Mathematics: Post your doubts here!

[student92]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

http://www.xtremepapers.me/CIE/Cambridg ... _qp_22.pdf
q4 the power of x should be 4, i cant get that. help please

 

[TSZ]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

student92, dis is for u
for may june 2010 ppr 22 Q 15 c (ii)
3x+y=18
y=-3x+c
2=-3(4)+c
2+12=c
14=c

Q16. distance =0.5*10*(10+16)
=130 m
now, 130=16*0.5*v
solve it, u'll get v=16.25m/s
Q 17 b . length of arcs= 45/ 360 * 2 * 3.142 * 12 * 4
=37.704 cm.
radius= 2 * 3.142* 8
= 50.272cm
length painted white= 50.272+37.704
= 88cm
Oct/ Nov 2009
Q4. 5/8 x^3/2 / 1/2 x ^ 5/2
5/8 x^3/2 * 2x^5/2
5/8*2 *x ^3/2+5/2
1.25x^4
hope i helped

 

[Abid357]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

The car travels faster than the truck from time 15s to 55s. The distance travelled by the car is the TOTAL area under the graph during this time. You are missing one point here. The calculation would be like this: [1/2 x (55-15) x (36-12)] + [(55-15) x (36-12)].
I think you can figure it out now.

Ahaa, I see. I only had to add the area of rectangle beneath. Your calculation is wrong though but still thanks very much for the concept hehe

 

[adhammoshasha]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Please Help,

I have a big problem in finding prime numbers please help me and give me an easy way of doing that :Bravo:

 

[adhammoshasha]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

I have a big problem please help me,

I always had a problem finding prime numbers please help me and give me an easy way

 

[Abid357]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Prime numbers are numbers that can be only divided by themselves to get 1 or by 1 to get themselves (and are NOT divisible by ANY other number).

Eg: 5 is a prime number. 5 / 1 = 5 AND 5 / 5 = 1.

All even numbers are not prime numbers, because they are divisible by 2 obviously.

To find a number whether it's divisible by 3, add the digits separately and check whether the total you get is divisible by 3 or not.

Eg: 285 is not a prime number. 285 ---> 2 + 8 + 5 = 15. And 15 is divisible by 3. (NOTE: this method only works for 3)

 

[Abid357]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Go through all the prime numbers till 100 for 2-3 times. That will surely help

 

[TSZ]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Wayne Rooney for u Q 7
(a) volume= l*b*h
=3(60) *1.2*0.3
=64.8 m^3
(b)volume=15(60)*1.2*0.8
=864m^3
percentage increase= 864-64.8/64.8 *100
=1230%( correct to 3 sig. fig.)
(c)Vol. of cylinder= pie*r^2*h
2=pie*r^2*1.3/1000 1000mm=1m
2*1000/pie *1.3=r^2
square root (490)=r
22.1m=r
(d) area= 50.40/0.12
=420m^2
area=l*perimter
420=l*(0.8+0.8+1.2)
420/2.8=l
150m=l
hope i helped

 

[XPFMember]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Assalamoalaikum!!

well thanks abcde and TSZ ...
guys...i am not reviewing ur queries today...bcoz i think they've all been answered and i hope they are clear to you...
If u still have confusions and want my help...then let me know..i'll try to check back later again

once again thanks abcde, TSZ and captain!!
Jazak Allah Khair!!

 

[student92]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

as salam alikum
i would like to thank every one for their help, math angel captian and so on.
but i have a small question, i dont know hitograms and i am very poor in it, so whats the probabilty of histograms not coming in tommorrows igcse maths 0580 paper 2, because i have done many papers and i could not find any question on histograms. if any one does know about a hard question on histograms in paper 2, please tell me. thanks

may allah help us all in tommorrow exams. ameen

 

[WayneRooney10]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

URGENT. What are symmetry PLANES? and how to calculate them???

 

[XPFMember]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

as salam alikum
i would like to thank every one for their help, math angel captian and so on.
but i have a small question, i dont know hitograms and i am very poor in it, so whats the probabilty of histograms not coming in tommorrows igcse maths 0580 paper 2, because i have done many papers and i could not find any question on histograms. if any one does know about a hard question on histograms in paper 2, please tell me. thanks

may allah help us all in tommorrow exams. ameen

Waalaikumassalam!!

histograms come in P4

URGENT. What are symmetry PLANES? and how to calculate them???

u know lines of symmetry ....right??
we dray lines of symmetry for 2D objects...and for 3D objects we have what is called as planes of symmetry

 

[Martee100]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Thanks Math Angel but I have my exam tomorrow and I had two doubts, could you explain me them?

The doubts are in this paper
http://www.xtremepapers.me/CIE/index.ph ... _qp_23.pdf

Q13
&
Q14

thanks!

 

[Nibz]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

For 13 =>
( a x 10^7) + (b x 10^6) = c x 10^6
Bring the '10^6' from the left hand side to the R.H.S!
=> (a x 10^7) / 10^6 + (b x 10^6) /10^6
=> ( a x 10 ) + (b)
c = 10a + b

for Q 14 => Just change the minutes and seconds into hours!
=> First change 55 minutes and 20 seconds into seconds => (55 x 60) + 20 => 3320
now change these seconds into hours => 3320/3600 = 0.9222222
Find the avg. speed now = Distance / time
=> 10 / 0.922222
=> 10.8 km/h (3 Sig. Figures)

Hope this helped!

 

[WayneRooney10]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Ohhh!! Thank you math_angel!!

 

[abcde]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

I am an O-level student and don't know much about IGCSE. What is the difference between Maths and Maths Extended in IGCSE?

 

[XPFMember]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

assalam-o-alaikum!!

i might be able to help u if u put forward the codes of the paper u r talking about

 

[abcde]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Umm..
0580: Mathematics
0581: Mathematics Extended
Do they have different syllabi or what?

 

[XPFMember]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Assalam o alaikum!!

actually everything...the paper ...syllabus and all is the same...only difference is 0581 includes sum coursework...which isnt there in 0580

 

[abcde]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

What do you mean by coursework?