Q&A - PSLE Math

[Andrew Lee]

MathIzzzFun:

Andrew Lee:

A coin box contained some $0.20 cent & $0.50 cent coins in the ratio of 4 : 5. When 16 $0.50 cent coins were taken out and replaced by some $0.20 cent coins, the ratio then became 8 : 7. The total value of the $0.20 cent coins added was the same as the total value of the $0.50 cent coins taken out. Find the sum of money in the coins box .

Hi

hope this helps

http://www.flickr.com/photos/62167097@N02/5924456939/in/photostream

cheers.

Thank you so much :rahrah:

[MathIzzzFun]

Andrew Lee:

MathIzzzFun:

[quote=\"Andrew Lee\"]A coin box contained some $0.20 cent & $0.50 cent coins in the ratio of 4 : 5. When 16 $0.50 cent coins were taken out and replaced by some $0.20 cent coins, the ratio then became 8 : 7. The total value of the $0.20 cent coins added was the same as the total value of the $0.50 cent coins taken out. Find the sum of money in the coins box .

Hi

hope this helps

http://www.flickr.com/photos/62167097@N02/5924456939/in/photostream

cheers.

Thank you so much :rahrah:[/quote]u r welcome

cheers.

[stary]

Thanks MathIzzzFun!!!

[Daddy]

Hi stary,


Joey : John
5 units : 1 unit
+$59 +$49
2 parts : 1 part

2 units + $98 = 5 units + $59
3 units -> $98-$59 = $39
5 units -> 5/3 x $39 = $65

The number in bold i did not understand. please...
How did you get it? Thanks

[stary]

Daddy:

Hi stary,


Joey : John
5 units : 1 unit
+$59 +$49
2 parts : 1 part

2 units + $98 = 5 units + $59
3 units -> $98-$59 = $39
5 units -> 5/3 x $39 = $65

The number in bold i did not understand. please...
How did you get it? Thanks

Hope this helps...
Joey : John
5 units : 1 unit
+$59 +$49
2 parts : 1 part

2 units + $98 = 5 units + $59
3 units -> $98-$59 = $39
5 units -> 5/3 x $39 = $65

(1 unit +$49) x 2 = 2 units + $98

[stary]

Hi all,

Need help again...


Two identical quadrants of a circle overlap each other as shown in the diagram below. The area of the square is 10 cm2. Find the area of the shaded regions, giving your answer in two decimal places.

http://www.flickr.com/photos/64113082@N03/5930094820/in/photostream

[MathIzzzFun]

stary:

Hi all,

Need help again...


Two identical quadrants of a circle overlap each other as shown in the diagram below. The area of the square is 10 cm2. Find the area of the shaded regions, giving your answer in two decimal places.

http://www.flickr.com/photos/64113082@N03/5930094820/in/photostream

Hi

http://i55.tinypic.com/33bd6bd.jpg\">

cheers.

[small]

Please help and many thanks in advance.


Question from a school paper:
Ben bought some bottles of glue for $20. He wanted to sell each bottle of glue for 40 cebts but only managed to sell 12 bottles. He then decided to lower the price and sold the remaining bottles for a total of $22.91.

(a) What was the lower price he sold each bottle for?
(b) How many bottles were sold at the lower price?

:?

[stary]

Hi MathIzzzFun,


Thanks again for your prompt solution.

Cheers :boogie:

[ozora]

Need help in this question.

5/9 of benny’s savings is the same as 2/3 of jessica’s savings at first. When jessica withdraws 1/3 of her savings and Benny added $70 to his. Benny then has $190 more than Jessica.
a) how much savings does jessica have in the end?
b) if Benny withdraws half of his savings. what fraction of benny’s savings is Jessica’s?