May/June Mathematics!!!!

[Nabeel Renaaz]

Ok first i would like to admit i am totally messed up in Mathematics.. And I could use some help from any of you guyz out there. Anything that will help me grasp the whole of maths within 2 months is all i need.

 

[PQ1]

I've taught myself using videos online (and from the Internet in general!) and from textbooks. Here are some really good youtube channels that I recommend:

Julie Harland is a really brilliant teacher! Her Youtube channel is here: http://www.youtube.com/user/videosbyjulieharland You can see a listing of her videos here:
https://sites.google.com/site/harlandclub/Home/math

http://www.yaymath.org/video.html Yaymath is also very good! He teaches his class and films it !

http://www.youtube.com/user/dougsimmsonline/videos?view=1&flow=grid I've also found this man to be an excellent teacher!

Also: http://www.youtube.com/user/Applepipproductions/videos

There are also a lot of videos on GCSE mathematic questions in general (below I've linked a few channels that do that). It's nice to work along with them, and I find it good revision. Since the videos consist of questions from other examination boards, there are some topics that aren't in the IGCSE mathematics syllabus - for instance, surds isn't in the 0580 syllabus But you can always check the 2013 syllabus content.

http://www.youtube.com/user/neilb860/videos?flow=grid&view=1

http://www.youtube.com/user/maths247/videos?view=1&flow=grid

Hope this helps!

 

[Nabeel Renaaz]

I've taught myself using videos online (and from the Internet in general!) and from textbooks. Here are some really good youtube channels that I recommend:

Julie Harland is a really brilliant teacher! Her Youtube channel is here: http://www.youtube.com/user/videosbyjulieharland You can see a listing of her videos here:
https://sites.google.com/site/harlandclub/Home/math

http://www.yaymath.org/video.html Yaymath is also very good! He teaches his class and films it !

http://www.youtube.com/user/dougsimmsonline/videos?view=1&flow=grid I've also found this man to be an excellent teacher!

Also: http://www.youtube.com/user/Applepipproductions/videos

There are also a lot of videos on GCSE mathematic questions in general (below I've linked a few channels that do that). It's nice to work along with them, and I find it good revision. Since the videos consist of questions from other examination boards, there are some topics that aren't in the IGCSE mathematics syllabus - for instance, surds isn't in the 0580 syllabus But you can always check the 2013 syllabus content.

http://www.youtube.com/user/neilb860/videos?flow=grid&view=1

http://www.youtube.com/user/maths247/videos?view=1&flow=grid

Hope this helps!

Wow!! Thanks a lot......Well that's the way i did my business studies paper, through videos. I find it more interesting that way.. Thanks

 

[Redouane]

Help you in what way? More details?? What exam are you taking? Core or Advanced? What coursebook are you using?

 

[Sweet Honey]

which topics you need help in ?

are you taking core or extended?

 

[examkiller]

which topics you need help in ?

are you taking core or extended?

Im having trouble with sets and sequences, extended maths.

 

[PQ1]

Im having trouble with sets and sequences, extended maths.

For sets I recommend these videos: https://sites.google.com/site/harlandclub/Home/math/sets

 

[examkiller]

thnks. For indices, maybe you could help me solve and open those indices. it was confusing for me. thnks
1. (5x^2y)^0=1
2.(1/2x)^-1
3.(5y)^2 divided by y
(2x^1/2)^4
(4x)^1/2 divide x^3/2
(3x^2)^2 x (1/9x^2)^1/2
(3x^-1)^2 divide 6x^-3

 

[PQ1]

thnks. For indices, maybe you could help me solve and open those indices. it was confusing for me. thnks
1. (5x^2y)^0=1
2.(1/2x)^-1
3.(5y)^2 divided by y
(2x^1/2)^4
(4x)^1/2 divide x^3/2
(3x^2)^2 x (1/9x^2)^1/2
(3x^-1)^2 divide 6x^-3

For Indices (also known as exponents), I would definitely recommend all these videos: https://sites.google.com/site/harlandclub/Home/math/algebra/exp and all these videos on rational exponents (which is also known as fractional indices): https://sites.google.com/site/harlandclub/Home/math/algebra/ratexp

I made some notes:








And here are my answers to your questions (I hope I got them right. Do you have the answers?):

 

[examkiller]

For Indices (also known as exponents), I would definitely recommend all these videos: https://sites.google.com/site/harlandclub/Home/math/algebra/exp and all these videos on rational exponents (which is also known as fractional indices): https://sites.google.com/site/harlandclub/Home/math/algebra/ratexp

I made some notes:








And here are my answers to your questions (I hope I got them right. Do you have the answers?):

Wow, thanks so much. Without your help, couldnt have done it.

 

[examkiller]

PQ1, so exactly what is a Base in indices ?

 

[PQ1]

PQ1, so exactly what is a Base in indices ?

From my understanding, the base is what is being raised by a power. The base could be an algebraic term or a number. You have to be careful with finding what is being raised by a power. For instance, in (4x)^7 the base is 4x because the whole thing is being raised to the power of 7, which is why there are brackets around the 4x. However, if it said 4x^7, the base is only x, as x is only being raised to the power of 7. Another example: In (-3)^7 the base is -3 and is being raised to the power 7. In -3^7, the negative sign is not included in the base and it is only 3 that is the base. Hope that helped.

 

[examkiller]

Yea

From my understanding, the base is what is being raised by a power. The base could be an algebraic term or a number. You have to be careful with finding what is being raised by a power. For instance, in (4x)^7 the base is 4x because the whole thing is being raised to the power of 7, which is why there are brackets around the 4x. However, if it said 4x^7, the base is only x, as x is only being raised to the power of 7. Another example: In (-3)^7 the base is -3 and is being raised to the power 7. In -3^7, the negative sign is not included in the base and it is only 3 that is the base. Hope that helped.

yeah thanks, ok if the question is like 1
( ------ x ) ^ -1
2


I mean the x is on the middle of the line not on bottom or top, if so would it be like this = However in textbook its 2/x ??? Im a bit confused

 

[PQ1]

Yea
yeah thanks, ok if the question is like 1
( ------ x ) ^ -1
2


I mean the x is on the middle of the line not on bottom or top, if so would it be like this = However in textbook its 2/x ??? Im a bit confused

Hmm, I got the same answer as you. I got 2. I also put it in a software called Microsoft Mathematics and it also got the answer 2. Maybe the answer in the book is wrong?

 

[examkiller]

Hmm, I got the same answer as you. I got 2. I also put it in a software called Microsoft Mathematics and it also got the answer 2. Maybe the answer in the book is wrong?

But in the picture i have made a small mistake as i put another x next to 2. although there wasnt one !! could you show me how you solved that question ? thnks

 

[PQ1]

Here was how I worked it out:

 

[examkiller]

10Mona made a model of a building using a scale of 1:20. The roof of the building had an area of 300 m2.
(a)Calculate the area of the roof of the model in square metres.
(b)Write your answer in square centimetres.
Answer (a) ................................................. m2
Answer (b) ............................................... cm2
Any idea how to solve this, its not ratio, not similarity. i tried everything. any ideas ?? ans is a) 0.75msqaured b)7500msq

 

[PQ1]

10Mona made a model of a building using a scale of 1:20. The roof of the building had an area of 300 m2.
(a)Calculate the area of the roof of the model in square metres.
(b)Write your answer in square centimetres.
Answer (a) ................................................. m2
Answer (b) ............................................... cm2
Any idea how to solve this, its not ratio, not similarity. i tried everything. any ideas ?? ans is a) 0.75msqaured b)7500msq

I used similarity to solve this. When the scale is given as 1:20 (without specified units), the units are same (unless specified, like 1cm:40km). Since the model's area for the roof is in square metres, the model is measured in metres, so it's 1m:20m. Then work the rest out finding the area of a similar shape.

 

[examkiller]

I used similarity to solve this. When the scale is given as 1:20 (without specified units), the units are same (unless specified, like 1cm:40km). Since the model's area for the roof is in square metres, the model is measured in metres, so it's 1m:20m. Then work the rest out finding the area of a similar shape.

like this ?

 

[examkiller]

any tips to solve this type of question ?

answer is 14.5cm sq