Maths, Addmaths and Statistics: Post your doubts here!

[abcde]

Re: O'level Maths, Addmaths and Statistics help available he

For question 7, you basically have to use trial and error.
The first statement is true. Note that the cube of any number greater than 1 is always greater than 1.
Statement 2 is also true.
Statement 3 is false. e.g. if n = 5 then (5-1)(5+3) = 4 x 8 = 32, which is even. Thus the statement is false.
I hope this helped.

if in the first statement n = 1 ?? then how 1 > 1 ??

The question clearly states that n > 1 so don't consider n = 1. Theek?

 

[abcde]

Re: O'level Maths, Addmaths and Statistics help available he

what about Q11 http://www.xtremepapers.me/CIE/Cambridg ... _qp_11.pdf i faced same difficulty when i faced similar q in my mock what to write in it ??

Here's the solution:
In triangles AOC and BOD,
AO = OB (radii of larger circle)
OC = OD (radii of smaller circle)
Angle AOC = Angle BOD (vert. opp. angles)
=> Triangles AOC and BOD are congruent. (SAS Property)
Thus, it can be proved that BD = AC (corresponding sides of congruent triangles).
Hope this helped.

 

[abcde]

Re: O'level Maths, Addmaths and Statistics help available he

Jazakallah pal
but i want to know in 8 b y we add ratios ?? and i have tried ryt now the same procedure to solve 8 a although i did it with multiplying method but not possible

What's not possible?

i tried same method as u showed me for 8a to practice this method
probably 9----> 14+x
then 7 ---> ((14/9)+x)*7

then how u'll get x ??

Part (a) is a bit different. Whereas in part (b), the total of the ages was given, here only Sayyed's age is mentioned. So do it like this:
2 ------> 14
7 ------> 14/2 x 7 = 7 x 7 = 49 years.
So his mother is 49 years old. Clear?

 

[xhizors]

Re: O'level Maths, Addmaths and Statistics help available he

For question 7, you basically have to use trial and error.
The first statement is true. Note that the cube of any number greater than 1 is always greater than 1.
Statement 2 is also true.
Statement 3 is false. e.g. if n = 5 then (5-1)(5+3) = 4 x 8 = 32, which is even. Thus the statement is false.
I hope this helped.

if in the first statement n = 1 ?? then how 1 > 1 ??

The question clearly states that n > 1 so don't consider n = 1. Theek?

chicken zabardast yar nice

 

[xhizors]

Re: O'level Maths, Addmaths and Statistics help available he

what about Q11 http://www.xtremepapers.me/CIE/Cambridg ... _qp_11.pdf i faced same difficulty when i faced similar q in my mock what to write in it ??

Here's the solution:
In triangles AOC and BOD,
AO = OB (radii of larger circle)
OC = OD (radii of smaller circle)
Angle AOC = Angle BOD (vert. opp. angles)
=> Triangles AOC and BOD are congruent. (SAS Property)
Thus, it can be proved that BD = AC (corresponding sides of congruent triangles).
Hope this helped.

yeah it really helped and SAS property ??
conclusion
~ so we can write like this in our answer sheet easy ??

 

[xhizors]

Re: O'level Maths, Addmaths and Statistics help available he

http://www.xtremepapers.me/CIE/Cambridg ... _qp_11.pdf
Q12b i dont know how to solve this type of equality
and Q16 and Q20

 

[chillpill94]

Re: O'level Maths, Addmaths and Statistics help available he

i had the same answer!!! thank you abcde for pointing it out and thank you hamidali391 for the assurance!!

 

[abcde]

Re: O'level Maths, Addmaths and Statistics help available he

i had the same answer!!! thank you abcde for pointing it out and thank you hamidali391 for the assurance!!

You're welcome but which answer are you talking about?

 

[xhizors]

Re: O'level Maths, Addmaths and Statistics help available he

ans for Q22 will be

 

[abcde]

Re: O'level Maths, Addmaths and Statistics help available he

http://www.xtremepapers.me/CIE/Cambridge%20O%20Levels/4024%20-%20Mathematics/4024_s10_qp_11.pdf
Q12b i dont know how to solve this type of equality
and Q16 and Q20

For question 12 (b) ,identify the equations of the lines of the boundary of region R. They are x = 0, x = 3 and y = 4.
So the inequalities will be x > 0, x < 3 and y > 4.

 

[leosco1995]

Re: O'level Maths, Addmaths and Statistics help available he

@hamidali: I already tried that method (it was the first method I tried actually) and got the same answer as you but it's wrong according to the book (36.5 km/hr and 125.3° are the answers to part (a)). Then I tried using the method in the link abcde provided, but that gave me an answer of 28.6km/hr. I don't know which one is right..

 

[OakMoon!]

Re: O'level Maths, Addmaths and Statistics help available he

Let me check it by the other method.
@abcde: Did you get how the angle of the quadrant in the circle is 60°?

 

[OakMoon!]

Re: O'level Maths, Addmaths and Statistics help available he

@abcde: Here it is. I am sure you'll figure out the rest. If you still don't. Ask again, don't hesitate.

 

[OakMoon!]

Re: O'level Maths, Addmaths and Statistics help available he

@Leosco1995: The answer by my method is also 28.6. I made a SILLY mistake. Just look at my solution, I wrote the answer of 16-(-10)=24. Totally absurd. :S
I am sorry for the confusion, if we use the right values 26 and 12 I get the same answers as the other method. I think the answer in the book is wrong or the values in the question are misquoted.

 

[leosco1995]

Re: O'level Maths, Addmaths and Statistics help available he

Yeah, I just noticed your mistake now too. I'm also sure that the answers to part (b) and (c) in the book are wrong too.

Anyhow, I don't have any difficulties with it anymore. Thanks

 

[OakMoon!]

Re: O'level Maths, Addmaths and Statistics help available he

No mistake could get sillier. That reminds me of my silly mistake in Olevels Maths P1 that deprived me from achieving a perfect score.

Good for you. I am glad I could help.

 

[xhizors]

Re: O'level Maths, Addmaths and Statistics help available he

@abcde: Here it is. I am sure you'll figure out the rest. If you still don't. Ask again, don't hesitate.

lol i did that too and posted was that wrong ??

 

[OakMoon!]

Re: O'level Maths, Addmaths and Statistics help available he

No. It wasn't wrong. I got a message from abcde that she still couldn't understand. So I made the post, further elaborating how the 60° comes. I hope you are not offended.

 

[xhizors]

Re: O'level Maths, Addmaths and Statistics help available he

no bhai here we r all for acquiring acha yar plz help me with these questions http://www.xtremepapers.me/CIE/Cambridg ... _qp_21.pdf
Q9 a (ii ), b(i) b and b(ii)

 

[abcde]

Re: O'level Maths, Addmaths and Statistics help available he

Thank you Hamid and xhisors! @Hamid: Silly mistakes are the worst!!!!! Fatal is the word!
@xhisors: Lemme look at your question