• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Mathematics: Post your doubts here!

Y

Yousif Mukkhtar

Messages
373
Reaction score
125
Points
53
ahmedali1 said:
guys from the pastpapers which one do u think was the hardest paper 4 ?
Click to expand...
October november 2009 is perfect I have got to say. Function graphs, sequences and probability that requires real thinking. Even there is a good similarity question!!!

And always smile. Here is how to do 7 c)

a) It says there is a similar cone having a radius 3 times higher than the original. As you know that a volume is always the cube of the ratio of the corresponding sides. So here just do 3^3 you get 27. So the answer is 27W. This means that the similar cone has a volume 27 times more than the original.

b) The radius is double, but remember that the formula for volume of a cone is given by 1/3 x pie x r^2 x h.

Because we double the radius, the volume will be four times more (there is a square sign on the radius so the square of 2 is 4) . The answer is 4W. Showing that the volume is 4 times higher.
 
kboss

kboss

Messages
357
Reaction score
138
Points
53
NIM said:
guys so fed up in maths & phy rite now, dont know wat to do!!!
Click to expand...
sit back, lie down, relax, chill out.............
oh wait i forgot...we have maths p4 and physics p1 on the same day
"!@#%"
:p
 
NIM

NIM

Messages
424
Reaction score
145
Points
53
Some exams tips ........ :D
Lost your Pen= No pen
No pen= No notes
No notes=No study
No study= Fail
Fail=No diploma
No diploma= No work
No work=No work
No work=No money
No money=No Food
No food= Skinny
Skinny = Ugly
Ugly = No love
No love = No marriage
No marriage = No children
No children = Alone
Alone = Depression
Depression = Sickness
Sickness = Death

Don't lose your pen, you will die...... :p
 
Lost_Life

Lost_Life

Messages
585
Reaction score
237
Points
53
kboss said:
10
ci) (this method is very long bt not sure of any other ones)
1) put any value of n...say 4
2) equate it to the number of diagonals for that shape i.e in this case 2
3) repeat one and 2 with any other value of n
4) turn it into simultaneous eqn.
5) solve it
6) p should be 2 and q should be 3

cii) its straightforward then
1) take 100 as n
2) put p as 2 and q as 3
3) solve it
4) answer should be 4850

ciii) (again...ive done it with a complicated method which is nt the best way probably)
1) make an eqn. from the formula
2) i.e. n^2 - 3n - 340 = 0 ( i forgot how i got it :p)
3) solve it
4) answer should be 20

d) no method....LOL just trial and error bt the answer is 31

hope it helps!!!
good luck!! :D
Click to expand...
this i sfor what????
 
You must log in or register to reply here.
Top