Tutor MathsGuru: Ask me for your burning Maths questions!

[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!

[MathIzzzFun]

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!

Hi

I do not have time to draw the model at the moment, I will try to put in words here..

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
-- draw 5 blocks for Fred (since 5/6 left) and also 5 blocks for Jim since they have the same amount... ie end state :
Jim --> 5 blocks
Fred --> 5 blocks

from here, one can see that this is after Fred give 1/6 to Jim, so, 5 blocks represent 5/6 of Fred's money before the transfer, ie he transferred 1 block to Jim. So, draw the model before this transfer --> transfer 1 block back to Fred and you will have 6 blocks for Fred and 4 blocks for Jim .. so, before Fred give 1/6 to Jim
Jim --> 4 blocks
Fred --> 6 blocks

again, from this model, one can see that Jim had 4 blocks left after giving 3/7 to Fred ie the 4 blocks represent 4/7 of Jim which means that before the transfer, Jim had 7 blocks. Now, draw the final model which is the start state -->
transfer 3 blocks back to Jim and we have
Jim --> 7 blocks
Fred --> 3 blocks...
10 blocks --> $ 40
1 block --> $4

At first,
Jim --> $4 x 7 = $ 28
Fred --> $4 x 3 = $ 12

cheers.

[helenLim2011]

MathIzzzFun You are indeed a math wizard.


Thanks very much and have a great time coaching online.

A very pleased Mdm Lim:)

[MathIzzzFun]

helenLim2011:

MathIzzzFun You are indeed a math wizard.


Thanks very much and have a great time coaching online.

A very pleased Mdm Lim:)

u r welcome

cheers.

[Kafer]

Hi i have one qn


John speed is ia x m/s.
Mary speed is y m/s
If john starts 2 sec later, he will take 8 secs to catch up with mary.
If john starts to run only when mary is 8m ahea 5 sec to catch up with her.
Form two eqn in x an y.

Can help?

[violin_lover]

8x=10y and 8+5y=5x

[Kafer]

violin_lover:

8x=10y and 8+5y=5x

Thanks! Can exlain how you workput the eqn?

[violin_lover]

Kafer:

violin_lover:

8x=10y and 8+5y=5x

Thanks! Can exlain how you workput the eqn?

Sure. But just to follow the \"tradition\", could you please tell us which level is the question pitch at and if possible, where did you encounter it?

[Kafer]

Hi, violin_lover, it is a sec level maths qn.

[violin_lover]

Kafer:

Hi i have one qn

John speed is ia x m/s.
Mary speed is y m/s
If john starts 2 sec later, he will take 8 secs to catch up with mary.
If john starts to run only when mary is 8m ahea 5 sec to catch up with her.
Form two eqn in x an y.
Can help?

In 10s, Mary travels 10y meter and in 8s, john travels 8x meter. Hence, 10y=8x.
Next, in the 5s, John travels 5x meter and the total distance travel is 8+5y. Thus, 5x=8+5y.