Tutor MathsGuru: Ask me for your burning Maths questions!

[MathIzzzFun]

kwcllf:

Hi please help with the following question:


Classes 6A and 6B have the same number of pupils. The ratio of the number of boys in 6A to 6B is 4:3. The ratio of the number of girls in 6A to the number of girls in 6B is 4:7. Find the ratio of the number of boys to the number of girls in 6A.

Thanks

Hi

a similar question was discussed some time ago - http://www.flickr.com/photos/62167097@N02/5760364658/in/photostream

cheers.

[kwcllf]

Hi MathIzzzFun,


Thanks again for the help!

[MathIzzzFun]

kwcllf:

Hi MathIzzzFun,


Thanks again for the help!

u r welcome

cheers.

[kwcllf]

Hi Please help with the following question:


There are some marbles. They are used to make a square with 13 rows and 13 columns. The marbles are then rearranged to form 2 squares, with the smaller square having 7 marbles less than the bigger square in each row. How many marbles are there in each row for the 2 squares?

Thanks.

[MathIzzzFun]

kwcllf:

Hi Please help with the following question:


There are some marbles. They are used to make a square with 13 rows and 13 columns. The marbles are then rearranged to form 2 squares, with the smaller square having 7 marbles less than the bigger square in each row. How many marbles are there in each row for the 2 squares?

Thanks.

Hi
This will involve solving of quadratic equations which are taught in Sec.

For upper primary, use Guess and Check, you will get 5 per row for small square and 12 per row for big square (13 x 13 = 5 x 5 + 12 x 12)

cheers.

[kwcllf]

MathIzzzFun:

kwcllf:

Hi Please help with the following question:


There are some marbles. They are used to make a square with 13 rows and 13 columns. The marbles are then rearranged to form 2 squares, with the smaller square having 7 marbles less than the bigger square in each row. How many marbles are there in each row for the 2 squares?

Thanks.

Hi
This will involve solving of quadratic equations which are taught in Sec.

For upper primary, use Guess and Check, you will get 5 per row for small square and 12 per row for big square (13 x 13 = 5 x 5 + 12 x 12)

cheers.

Hi,

I am a little confused. My kid was also told to use Guess & Check.

But if marbles are used to make 13 rows and 13 columns, aren't there 14 marbles needed across each rows and columns to construct the square grid? That is, there are 14x14=196 marbles in total if we use the marbles to mark each point on the square grid.

The question said there are 7 marbles more in each row for the bigger sqaure. It didn't say there are 7 rows more :?

[MathIzzzFun]

kwcllf:

MathIzzzFun:

[quote=\"kwcllf\"]Hi Please help with the following question:


There are some marbles. They are used to make a square with 13 rows and 13 columns. The marbles are then rearranged to form 2 squares, with the smaller square having 7 marbles less than the bigger square in each row. How many marbles are there in each row for the 2 squares?

Thanks.

Hi
This will involve solving of quadratic equations which are taught in Sec.

For upper primary, use Guess and Check, you will get 5 per row for small square and 12 per row for big square (13 x 13 = 5 x 5 + 12 x 12)

cheers.

Hi,

I am a little confused. My kid was also told to use Guess & Check.

But if marbles are used to make 13 rows and 13 columns, aren't there 14 marbles needed across each rows and columns to construct the square grid? That is, there are 14x14=196 marbles in total if we use the marbles to mark each point on the square grid.

The question said there are 7 marbles more in each row for the bigger sqaure. It didn't say there are 7 rows more :?[/quote]Hi

hope this will help ..

http://i44.tinypic.com/15chrp4.jpg\">

cheers.

[helenLim2011]

Hello, I have a burning Question Here. Hope you can solve. Thanks Mr Kiasu


Can Someone help me at this Maths Problem? Its driving me NUTS

Jim and Fred had a total of $40. Jim gave 3/7 of his money to Fred. Fred then gave 1/6 of the total amount of money he had to Jim. In the end, each of them had the same amount of money. How much money did each of them have at first?

(This is a P5 Question so plse reply in a P5 manner of understanding!) Bless you for helping me out…

[MathIzzzFun]

helenLim2011:

Hello, I have a burning Question Here. Hope you can solve. Thanks Mr Kiasu


Can Someone help me at this Maths Problem? Its driving me NUTS

Jim and Fred had a total of $40. Jim gave 3/7 of his money to Fred. Fred then gave 1/6 of the total amount of money he had to Jim. In the end, each of them had the same amount of money. How much money did each of them have at first?

(This is a P5 Question so plse reply in a P5 manner of understanding!) Bless you for helping me out...

Hi

you can work backwards ..
In the end,
Jim --> $ 20
Fred --> $20 --- this is after Fred gave 1/6 to Jim, so this amount is equal to 5/6 of Fred's money.

Before Fred gave 1/6 to Jim,
Fred --> $ 20 x 6 /5= $ 24
Jim --> $ 40-$ 24 = $16 -- this is equal to 4/7 of Jim's money at first

At first,
Jim --> $ 16 x 7/4 = $ 28
Fred --> $ 40 - $ 28 = $ 12

cheers.

[helenLim2011]

Hi MathIzzzFun


Thanks for the great help but my girl is the visual sort. Are you able to illustrate the answer using models?


Much thanks again!