Q&A - PSLE Math

[tianzhu]

Michaelia0816:

I need the solution, I tried to do the soltion, is it very multiple of 9 and 10 is removed, I do not really understand what it meant.
:salute: Please help, ^.^

Hi

Please refer to page 775 of this thread for the solutions.

Best wishes

[dora miscq]

Alice, Ben,Catherine and Dino donated some money to the Red Cross.

The ratio of the amount donated by Alice to the total amount donated by Ben, Catherine and Dino was 1 : 7.
Ben donated 5/11 as much as the total donated by Alice, Catherine and Dino.
Catherine donated 60% of the amount donated by Alice, Ben and Dino.
If Ben donated $120 more than Dino, what was the total amount donated by the 4 pupils?

[MathIzzzFun]

dora miscq:

Alice, Ben,Catherine and Dino donated some money to the Red Cross.

The ratio of the amount donated by Alice to the total amount donated by Ben, Catherine and Dino was 1 : 7. --> total 8
Ben donated 5/11 as much as the total donated by Alice, Catherine and Dino. --> total 16
Catherine donated 60% of the amount donated by Alice, Ben and Dino.
--> 3:5 --total 8
If Ben donated $120 more than Dino, what was the total amount donated by the 4 pupils?

Total amount donated is the same.

A: A+B+C+D = 1:8 --> 2u : 16u
B: A+B+C+D --> 5u : 16u
A+B+C+D = 3: 8 --> 6u : 16u
A:B:C:D --> 2u: 5u : 6u: (16u-6u-5u-2u) --> 2u : 5u : 6u : 3u -- total 16u

B donated $120 more than D,
2u --> $120
16u --> $960

Total amount donated = $960

cheers.

[Tiramisu Coco]

tianzhu:

Tiramisu Coco:

Hi Tianzhu, thks for your reply.

This qtn has not been discussed before, think u refer to the wrong qtn on the photostream. It's the last item abt ABCD is a square of 20cm. E & F are the mid-points of AB & AD. Find area of shaded region.
Would appreciate your help for this qtn. TIA

Hi

When I clicked on your link, all I could see was a circle inscribed in a triangle.

Based on your description, perhaps this question may help.

Q15 of this paper, please go to page 35 of this link.

http://www.orlesson.org/orp/10Ma/2010-P6-Math-SA2-Rosyth.pdf


Best wishes.

http://farm5.staticflickr.com/4103/5037820252_8aa41e056c_z.jpg\">

Gd morning, tianzhu! Thks for the reply. I used similar approach to solve my qtn but still not able to get the ans given: 266 2/3 cm2. Can guide me the steps to solve? Thk u.

[Tiramisu Coco]

Hi tianzhu, here's the link to the qtn. TIA


http://m.flickr.com/#/photos/82618212@N07/7837766706/

[MathIzzzFun]

Tiramisu Coco:

Hi tianzhu, here's the link to the qtn. TIA


http://m.flickr.com/#/photos/82618212@N07/7837766706/

http://i47.tinypic.com/rucz06.png\">

cheers.

[kay22]

Can someone help me with the following question:


Susan has some $0.50, $0.20 and $0.10 coins. The value of the coins she has is in the ratio 5:21:15. She used 4/7 of the $0.50 coins and 98 of the $0.20 coins and she left $270.40. What is the percentage of $0.50 coins does she has?

:roll:

[Michaelia0816]

Thx

[tianzhu]

kay22:

Can someone help me with the following question:


Susan has some $0.50, $0.20 and $0.10 coins. The value of the coins she has is in the ratio 5:21:15. She used 4/7 of the $0.50 coins and 98 of the $0.20 coins and she left $270.40. What is the percentage of $0.50 coins does she has?

:roll:

Hi

Could you share where this question is from?

I interpret the sentence highlighted in blue as showing the number instead of value of money because it states she uses 98 of the $0.20 coins.

But I’ve a sum of $247.40 instead of $270.40.

Best wishes

[Tiramisu Coco]

MathIzzzFun:

Tiramisu Coco:

Hi tianzhu, here's the link to the qtn. TIA


http://m.flickr.com/#/photos/82618212@N07/7837766706/

http://i47.tinypic.com/rucz06.png\">

cheers.

:thankyou: MathIzzzFun