Q&A - PSLE Math

[bellerina]

Yu Xuan:

bellerina:

Please help on this Q! Thanks!


Jack packed his books into 2 boxes, Box A & Box B.
He packed (4/5) as many books in Box A as Box B at 1st.
After transferring 16 books from Box B to Box A, there are now (3/4) as many books in Box B as Box A.
How many books were there in each box at 1st?

Hi, this is internal transfer with unchange total.
Equate the total of both A & B before and after the transfer;

Before
A : B
4 : 5
28 : 35 Total --> 63

After
A : B
4 : 3
36 : 27 Total --> 63

Using A;
36u - 28u --> 16
8u --> 16
1u --> 16 / 8 = 2

At first;
A--> 2 * 28 = 56
B --> 2 * 35 = 70

:thankyou: ~ Yu Xuan!

[Belle2011]

Dear all,

Please help me with
Jean is a hairdresser. She receives a fixed basic salary each month. She also receives a commission of 15% per hair service done. Last year, the average amount that she received for her hair services per month was $2,400. If her earnings was $17,520 last year, find her monthly fixed basic salary.
(source: PSLE Revision paper 4; answer is $1100).
Thank-you.

Cheers,
Belle.

[Dharma]

Belle2011:

Dear all,

Please help me with
Jean is a hairdresser. She receives a fixed basic salary each month. She also receives a commission of 15% per hair service done. Last year, the average amount that she received for her hair services per month was $2,400. If her earnings was $17,520 last year, find her monthly fixed basic salary.
(source: PSLE Revision paper 4; answer is $1100).
Thank-you.

Cheers,
Belle.

Average earnings per month = $17,520.00 / 12 = $1460.00
Average commission earned per month = 15% x $2400.00 = $360.00
Monthly fixed salary = $1460.00 - $360.00 = $1,100.00

[Belle2011]

Dharma:

Belle2011:

Dear all,

Please help me with
Jean is a hairdresser. She receives a fixed basic salary each month. She also receives a commission of 15% per hair service done. Last year, the average amount that she received for her hair services per month was $2,400. If her earnings was $17,520 last year, find her monthly fixed basic salary.
(source: PSLE Revision paper 4; answer is $1100).
Thank-you.
Cheers,
Belle.

Average earnings per month = $17,520.00 / 12 = $1460.00
Average commission earned per month = 15% x $2400.00 = $360.00
Monthly fixed salary = $1460.00 - $360.00 = $1,100.00

Thanks very much, Dharma.
How come I didn't think of that?

What about
There are a total of 548 pupils in a hall. 2/5 of the girls are 24 less than
2/3 of the boys. How many boys are there in the hall?

Many thanks again.

Cheers,
Belle.

[christina soh]

Dharma:

Belle2011:

Dear all,

Please help me with
Jean is a hairdresser. She receives a fixed basic salary each month. She also receives a commission of 15% per hair service done. Last year, the average amount that she received for her hair services per month was $2,400. If her earnings was $17,520 last year, find her monthly fixed basic salary.
(source: PSLE Revision paper 4; answer is $1100).
Thank-you.

Cheers,
Belle.

Average earnings per month = $17,520.00 / 12 = $1460.00
Average commission earned per month = 15% x $2400.00 = $360.00
Monthly fixed salary = $1460.00 - $360.00 = $1,100.00

Hi,

I have another question, pls help.

Jan and Kay had equal number of sweets and equal number of chocolates. Jan ate 12 sweets and Kay ate 18 chocolates and then the ratio of Jan's sweets to chocolates became 1:7 and the ratio of Kay's sweets to chocolates became 1:4. How many sweets did Jan have at first?

[Hershey]

Thank you very much for your reply. I really appreciate.

[tianzhu]

Hi Belle


Hope this helps.

Best wishes.

http://farm6.static.flickr.com/5014/5427286514_29e30dffb2_b.jpg\">

[tianzhu]

Hi


Hope this helps.

Besides MD, you may also use the Units Method to solve this question.

Best wishes.

http://farm6.static.flickr.com/5014/5426816697_79d7f82bcc_b.jpg\">

[Brenda10]

tianzhu:

Hi


Hope this helps.

Besides MD, you may also use the Units Method to solve this question.

Best wishes.

http://farm6.static.flickr.com/5014/5426816697_79d7f82bcc_b.jpg\">

Hi Tianzhu

Thanking for your great effort to present it in such a nice picture.

[christina soh]

Brenda10:

tianzhu:

Hi


Hope this helps.

Besides MD, you may also use the Units Method to solve this question.

Best wishes.

http://farm6.static.flickr.com/5014/5426816697_79d7f82bcc_b.jpg\">

Hi Tianzhu

Thanking for your great effort to present it in such a nice picture.

Thank you Tianzhu.