Q&A - P5 Math

[Brenda10]

ck123:

Hi anyone


Please help with the following questions:

2) A seamstress had some white and some black buttons. 60% of the buttons were white. He bought another 120 buttons. Now, the percentage of white buttons became only 40% of the total. How many white buttons did he have at first?

Thanks a lot... :?:

[/img][/list]

Hi, dd working for Q2)

W:B
3:2 (Before)
Plus 120
4:6 (After)

4-3=1
6-2=4
1+4=5
120/5=24
24*3= 72

There are 72 white marbles at frist.

Thank you.

[Brenda10]

ck123:

Hi anyone


Please help with the following questions:

1) Zara had 70 more dresses than skirts. She sold 3/4 of the dresses and 3/5 of the skirts. She sold 126 more dresses than skirts. What fraction of the remaining clothes that Zara had were skirts?Thanks a lot... :?:

[/img][/list]

Hi, you may refer the following link for solution.

http://www.kiasuparents.com/kiasu/forum/viewtopic.php?t=6373&postdays=0&postorder=asc&start=2880

[iFruit]

ck123:

Hi anyone


Please help with the following questions:

2) A seamstress had some white and some black buttons. 60% of the buttons were white. He bought another 120 buttons. Now, the percentage of white buttons became only 40% of the total. How many white buttons did he have at first?

Thanks a lot... :?:

[/img][/list]

I think this is question is incomplete. There can be many solutions as it is.

[ck123]

A big Thank You to all. :celebrate:


How can i insert a picture for a question to ask?

Thanks[/img]

[greenfinger]

Hi ,anyone can help me, pls



question:

A wheel made 72 revolutions.It has a radius of 23 cm.How far did it travel? :?

[jieheng]

greenfinger:

Hi ,anyone can help me, pls



question:

A wheel made 72 revolutions.It has a radius of 23 cm.How far did it travel? :?

The distance it travelled = No. of revolutions * Circumference = No. of revolutions * Pi * Diameter = 72 * 3.14 * ( 2 * 23 ) = 10400 cm (Ans)

[Woodybird]

Mary, Jonatha and David shared a sum of money. The total amount of money received by Jonathan was 2/3 the amount received by David. Mary received twice as much as what Jonathan and David received. After Mary had given $48 to Jonathan and $27 to David, and Jonathan gave $3 to David. At the end 3 of them had the same amount of money. Find the difference between the amount of money that Jonathan and Mary had at first

[jieheng]

Woodybird:

Mary, Jonatha and David shared a sum of money. The total amount of money received by Jonathan was 2/3 the amount received by David. Mary received twice as much as what Jonathan and David received. After Mary had given $48 to Jonathan and $27 to David, and Jonathan gave $3 to David. At the end 3 of them had the same amount of money. Find the difference between the amount of money that Jonathan and Mary had at first

At first
J [-][-] (2u)

D[-][-][-] (3u)

M[-][-][-][-][-][-][-][-][-][-] (10u)



J [-][-] (2u) + 48 - 3

D[-][-][-] (3u) + 27 + 3

M[-][-][-][-][-][-][-][-][-][-] (10u) - 48 - 27

3u + 27 + 3 -----> 2u + 48 - 3

1u -----> 15

Difference between the amount of money that Marie and Jonathan had at first = 8u = 8 * 15 = $ 120 (Ans)

[Neat]

Hi


Please assist on the following:

Mrs Lim bought a luggage, a jacket and a pair of shoes. The jacket and the pair of shoes cost $232.10. The luggage and the jacket cost $560.60. The luggage cost 4 times as much as the pair of shoes. How much more did the luggage cost than the jacket?

Thanks.

[linden2000]

Cost of luggage - cost of shoes = $560.60-$232.10 =$328.50

Since cost of luggage is 4x cost of shoes,
luggage -> 4 units
shoes -> 1 unit
difference -> 3 units
3 units = $328.50
1 unit = $109.50
Shoes cost $109.50
Jacket costs $232.10 - $109.50 = $122.60
luggage costs $109.5 x 4 = $438
diff of cost bet jacket n luggage = $315.40