Q&A - PSLE Math

[fsaith]

[quote]Hi


This is variatiion to typical \"transfer\" problem.

First, assume we start with situation after Siti has taken 3 dark chocolate ie initial = dark : white = 5 : 4. Then the situation of \"when Siti eats 3 white chocolate\" would become after exchanging 3 white chocolate for 3 dark chocolates, the ratio = 7:5

So we have :

initial, dark : white = 5 : 4 = 20u : 16u
after, dark : white = 7 : 5 = 21u : 15u

1u = 3
Initial, dark: white = 20 u : 16u = 60:48

need to add back the 3 dark chocolates

There were 63 dark chocolates and 48 white chocolates at first.

cheers.[/quote]Thank you so much for your help!

[MathIzzzFun]

fsaith:

[quote]Hi


This is variatiion to typical \"transfer\" problem.

First, assume we start with situation after Siti has taken 3 dark chocolate ie initial = dark : white = 5 : 4. Then the situation of \"when Siti eats 3 white chocolate\" would become after exchanging 3 white chocolate for 3 dark chocolates, the ratio = 7:5

So we have :

initial, dark : white = 5 : 4 = 20u : 16u
after, dark : white = 7 : 5 = 21u : 15u

1u = 3
Initial, dark: white = 20 u : 16u = 60:48

need to add back the 3 dark chocolates

There were 63 dark chocolates and 48 white chocolates at first.

cheers.

Thank you so much for your help![/quote]u r welcome :lol:

cheers.

[stary]

Dharma:

If Charles continued driving after reaching the finishing line, he would have covered an additional 45km in the same time that Tony took to finish the race.


Time taken by Charles to drive the additional 45km = 45km/(90km/h) = 0.5 hr
Therefore, Charles finished the race (reached the finishing line) ½ hr earlier than Tony.[9.05 a.m.]

Hi Dharma n ksi,

Thanks for the solution. I got it. Tony will be 1/2 hrs faster than Charles, so Charles will reach finishing line at 9:35 + 1/2 hrs = 10:05 am

CHEERS :dancing:

[Brenda10]

tianzhu:

Brenda10:

Thank you Tianzhu and do take your time.

Hi Brenda10.

Hope this helps.

Best wishes.

http://farm4.static.flickr.com/3325/5817158092_59fee6a1d8_z.jpg\">

http://farm6.static.flickr.com/5064/5816591015_a98e4eb5a1_z.jpg\">

Hi Tianzhu

Thank you for your wonderful picture and explanation. DD said she can understand and also like the presentation. :lol:

[WLRR]

Hello


Need help with the following question:

The total mass of Jane and Jacky is 101 kg and the total mass of Jacky and Jorine is 77 kg. Jane is twice as heavy as Jorine. What is the average mass of the three girls ?

[Hifive]

Hi


Maths problem - pls help…

Terry and John went shopping with a total of $198. Terry had $10 more than John. Terry spent 25% as much money as John. After which, he had twice as much money as John.
a) How much money did Terry bring for shopping?
b) How much money had Terry left after shopping?

Kindly help. Thanks in advance!

[corneyAmber]

WLRR:

Hello


Need help with the following question:

The total mass of Jane and Jacky is 101 kg and the total mass of Jacky and Jorine is 77 kg. Jane is twice as heavy as Jorine. What is the average mass of the three girls ?

http://i53.tinypic.com/qmys1w.jpg\">

[adanial]

Hello, pls help with the question below…thank you


Question 1
Loyang electronic store sold television sets, fans and washing machines.
2/5 of the items in the store were television sets. 12.5% of the remainder were fans and the rest were washing machines. During a sale held in december, the number of televsion sets sold to the number of fans sold to the number of washing machnes sold was 3:2:4. Altogether 3/4 of the items in the store were sold and $34070 was collected from the sale of all the items.
The table below shows teh average selling price of the 3 items in loyang electronic store :

TV set - $1350
Fan - $102
Washing m/c - $640

How many washing machines were on sale at first ?


Question 2
Julie had to complete a jigsaw puzzle. On thefirst day, she managed to complete 20% of the puzzle. On the second day she fitted another 60 pc of the puzzle. As a result, the ratio of the number of fitted pieces to the ration of the number of unfitted pieces became 2:5. How many pieces did the jigsaw puzzle consist of ?

[WLRR]

ksi:

WLRR:

Hello


Need help with the following question:

The total mass of Jane and Jacky is 101 kg and the total mass of Jacky and Jorine is 77 kg. Jane is twice as heavy as Jorine. What is the average mass of the three girls ?

http://i53.tinypic.com/qmys1w.jpg\">

Hi ksi

Thank you for your explanation.

[tianzhu]

Brenda10:

Hi Tianzhu
Thank you for your wonderful picture and explanation. DD said she can understand and also like the presentation. :lol:

Hi Brenda10

Good Morning.

I am happy your dd liked my “masak masak” way of doing maths.

Best wishes