Welcome to Test-paper.info
Sunday, January 21 2018 @ 12:43 AM CST
 Select a Forum » General Chat » Primary 1 Matters » Primary 2 Matters » Primary 3 Matters » Primary 4 Matters » Primary 5 Matters » Primary 6 Matters » Question, Feedback and Comments » Education Classified
 Forum Index >  Test Paper Related >  Primary 6 Matters RGS –SA1-2010, Paper 2 Qn4
 | Printable Version
 By: thayal (offline)  Saturday, April 28 2012 @ 10:18 AM CDT (Read 1118 times)
thayal

HI All
psl help to answere the following qn.

Basket A and B have equal number of marbles.
The number of blue marbles in basket A is 3/5 of the number of blue marbles in basket B.
The number of red marbles in basket B is 3/7 of the number of red marbles in basket A.
What is the ratio of the number of blue marbles to the number of red marbles in basket B?

thanks
thyal

Junior

Registered: 04/18/09
Posts: 21

 By: MathIzzzFun (offline)  Saturday, April 28 2012 @ 11:57 PM CDT
MathIzzzFun

Quote by: thayal

HI All
psl help to answere the following qn.

Basket A and B have equal number of marbles.
The number of blue marbles in basket A is 3/5 of the number of blue marbles in basket B.
The number of red marbles in basket B is 3/7 of the number of red marbles in basket A.
What is the ratio of the number of blue marbles to the number of red marbles in basket B?

thanks
thyal

Hi
difference in blue marbles = difference in red marbles

Blue A : Blue B --> 3:5 (difference of 2), Red A : Red B --> 7:3 (difference of 4)
So,
Blue A : Blue B --> 6u : 10u
Red A : Red B --> 7u : 3u
So, Blue B: Red B = 10:3

cheers.

Chatty

Registered: 04/02/10
Posts: 36

 By: thayal (offline)  Sunday, April 29 2012 @ 04:12 AM CDT
thayal

HI
Thanks for ur reply but still could you share some details on how you say that both the difference in two marbles are the same
thanks

Junior

Registered: 04/18/09
Posts: 21

 By: MathIzzzFun (offline)  Sunday, April 29 2012 @ 07:23 AM CDT
MathIzzzFun

Quote by: thayal

HI
Thanks for ur reply but still could you share some details on how you say that both the difference in two marbles are the same
thanks

Hi

you may want to draw a simple model
- draw 2 equal blocks for Basket A and Basket B and each with Blue and Red
- Blue region in A is longer than Blue region in B

and you will see why the difference is the same.

cheers.

Chatty

Registered: 04/02/10
Posts: 36

 By: thayal (offline)  Wednesday, May 02 2012 @ 06:51 AM CDT
thayal

HI Mathizzfun

Perfect explanation ... thanks

Thayal

Junior

Registered: 04/18/09
Posts: 21

 All times are CST. The time is now 12:43 am.
 Normal Topic Locked Topic Sticky Topic
 New Post Sticky Topic w/ New Post Locked Topic w/ New Post
 View Anonymous Posts Able to Post HTML Allowed Censored Content