Maths, Addmaths and Statistics: Post your doubts here!

[ashiqbal]

ashiqbal Well done mate, Your explanation is appriciated on Twitter too. Seriously *Hats-off*
The Guy is one of my friends!
Everyone liked it!

thanks yaar! mujhe pehlay pata hota kai tum logon ko yeh tareeqa itna pasand aayay ga tou i would have posted it sooner. I thought that it was a very awkward way to learn! Seriously!

 

[MustafaMotani]

I really want help. itx urgent. My exam is day after tomorrow! This question is from may/june 2011 paper 1. I can not solve question 13 part b (ii). The answer is
1.34 x 10^7. Please can u help me how to reach on this answer!
Waiting............

LOL everyone has paper day after tomorrw

its
2.1 x 10^7 - 7.6 x 10^6
21 x 10^6 - 7.6 x 10^6
13.4 x 10^6
1.34 x 10^7

 

[ashiqbal]

I really want help. itx urgent. My exam is day after tomorrow! This question is from may/june 2011 paper 1. I can not solve question 13 part b (ii). The answer is
1.34 x 10^7. Please can u help me how to reach on this answer!
Waiting............

first convert both to either 10^7 form or 10^6 form so that they can be added or subtracted
If u convert both to 10^7, then the amount of rice in brazil will become 0.76 * 10^7 (because you are multiplying by an extra 10, you have to divide the number beside it by 10 to keep the value same)
the difference will be (2.1*10^7-0.76*10^7) subtract 0.76 from 2.1 now that you have both in the same powers of 10. 2.1 -0.76 =1.34
answer is 1.34 *10^7. Understood?

 

[Spidey21]

I really want help. itx urgent. My exam is day after tomorrow! This question is from may/june 2011 paper 1. I can not solve question 13 part b (ii). The answer is
1.34 x 10^7. Please can u help me how to reach on this answer!
Waiting............

ill type the name
Brazil, china, veitnam, india (part one)
part (ii)
well see here
Veitnam = 21 x 10^6 ( i changed it to power 6 so that it becomes ez to solve )
then Brazil = 7.6 x 10^6
now subtract
21-7.6= 13.4
now put the power to it
13.4 x 10^6
now as it has to be standard form
1.34 x 10 ^7
hope it helps!!

 

[Spidey21]

MustafaMotani and ashiqbal
btw guys need help in
q 14 first part
http://www.xtremepapers.com/papers/...(Calculator Version) (4024)/4024_s03_qp_1.pdf

 

[MustafaMotani]

thanks yaar! mujhe pehlay pata hota kai tum logon ko yeh tareeqa itna pasand aayay ga tou i would have posted it sooner. I thought that it was a very awkward way to learn! Seriously!

nyc tareeqa..
wesay wo book meray pas b hai jis se tum ne highlight ki thi

 

[Dukeofwin]

I really want help. itx urgent. My exam is day after tomorrow! This question is from may/june 2011 paper 1. I can not solve question 13 part b (ii). The answer is
1.34 x 10^7. Please can u help me how to reach on this answer!
Waiting............

Its asking the difference between Population of Vietnam and Brazil,
Its simple, Dont look at the Number being multiplied with 10 rather look at the power of 10! The greater the power the bigger the number. So in this case its Brazil Subtratced by Vietnam.
Now to subtract you have to get both powers of 10 the same thus
You can make 7.6x10^6 to 0.76x10^7
Now simply subtract 0.76 from 2.1 and you'll get 1.34 x10^7.
(The reason we converted to 10^7 was that during addtition or subtraction the answer always has the bigger power of the two numbers being used)

Hope I made some sense

 

[MustafaMotani]

MustafaMotani and ashiqbal
btw guys need help in
q 14 first part
http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s03_qp_1.pdf

GAC = 90 (because GA is tangent)
EAC = 180 - 128 = 52 (cyclic quadrilatteral)
GAE= 90-52 = 38

 

[Spidey21]

GAC = 90 (because GA is tangent)
EAC = 180 - 128 = 52 (cyclic quadrilatteral)
GAE= 90-52 = 38

i did not notice the cyclic wala part

 

[ashiqbal]

MustafaMotani and ashiqbal
btw guys need help in
q 14 first part
http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s03_qp_1.pdf

GAC is 90 degrees, ok? (tangent through centre)
EAC is 180-128 = 52 ( Cyclic quadrilateral : opposite angles equal 180 degrees)
GAE is GAC - EAC = 38 degrees.

 

[MustafaMotani]

i did not notice the cyclic wala part

u got it now

 

[Haris Bin Zahid]

MustafaMotani and ashiqbal
btw guys need help in
q 14 first part
http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s03_qp_1.pdf

EAC= 180-128=52
Tangent makes 90 degree with the radius.
So....GAE=90-52=38
Kindly check the answer......is it right?

 

[ashiqbal]

i did not notice the cyclic wala part

hmmm. yehi hota hai, u miss one small detail and u r stuck there for hours in angles!

 

[MustafaMotani]

EAC= 180-128=52
Tangent makes 90 degree with the radius.
So....GAE=90-52=38
Kindly check the answer......is it right?

yar wo maths ka sawal tha ya admaths.. ??

 

[Spidey21]

(c) A and B are two points in space which are 10 cm apart.
Describe fully the locus of points in three dimensions that are 3 cm from the line
which starts at A and ends at B.

 

[MustafaMotani]

(c) A and B are two points in space which are 10 cm apart.
Describe fully the locus of points in three dimensions that are 3 cm from the line
which starts at A and ends at B.

cylinder I tink

 

[Spidey21]

cylinder I tink

wo to mein nu pata hai answer ke howe ga??

 

[HarisLatif]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_w11_qp_22.pdf question 3 part b

 

[MustafaMotani]

wo to mein nu pata hai answer ke howe ga??

bhai cylinder hoga na with height of 10 cm and radius 3 cm..
kia tumhay answer pata hai.. ??

 

[Spidey21]

bhai cylinder hoga na with height of 10 cm and radius 3 cm..
kia tumhay answer pata hai.. ??

nain...agar pata hota to puchta??