Good Morning Tianzhu,


Thank you for your explanation and pointing me to the correct page for the answer!

Have a nice day!

Hi,


Need help with the following questions:

1. I have some red and blue ribbons in a bottle.
If I add in 20 red ribbons, 60% of my ribbons are blue.
If I add in another 60 blue ribbons, 75% of my ribbons are blue.
How many ribbons have I in the bottle?

2. Rectangle A overlaps with Rectangle B. Rectangle A is twice the size of Rectangle B.
If 1/3 of Rectangle B overlaps with Rectangle A, what fraction of Rectangle A
overlaps with Rectangle B?

Thanks.

:thankyou:, zeemimi

Hi,


Need help with below Q:

Catholic High 2011 SA 2 P2:
Q14. Aaron and Ben shared a sum of $200. Aaron gave 3/5 of what he has to Ben. Ben later gave 1/5 of what he has back to Aaron. They ended up wtih equal amount of money. How much did Aaron have at first?

Thanks.

Udon:

Need your help to check ....Is my calculation right?

Thank you...

Q1. Matthew saved 1/5 of his monthly salary. He spent 3/8 of the remaining money on transport and the rest on food and other expenses. What fraction of his salary did he spend on food and other expenses?

Salary - 5/5 - 1/5 = 4/5

Spent - 3/8 (on transport)
Spent - 5/8 (on food & other expenses)

Fraction of his salary - 5/8 x 4/5 = 1/2 ?

Regards
Udon

Hi Udon,

Yes, your answer is correct.

Hi dazzlego,


Thank you for your explanation. I get it now, my solution:

R:B+G+W
2:3
10:15
50:75

B:R
3:5
6:10
30:50

G:W
3:2
27:18

23u - 460
1u - 460/23 = 20
125u - 20 x 125 = 2500

Cheers,

Hi, need help with the following Q:


Catholic High SA2 2011 P2:
Q18. A bag contains some red, blue, green and white marbles. 40% of the marbles are red. The number of blue marbles is 3/5 the number of red marbles. The ratio of the number of green marbles to white marbles is 3:2. There were 460 more red marbles than green marbles. How many marbles are there in the bag?
Please solve using unit method.
Thanks!

Hi Maths Hub,


:thankyou: for the fast response!

Hi, need help to answer the following questions from NanHua 2011 SA2 Paper 2.


Q1. A quarter of Jovern’s mass is twice that of Evelyn’s mass. Find the ratio of Eveyln’s mass to Jovern’s mass.

Q6. 36 scouts were told to line up in a row along one side of the square-shaped Assembly Ground from corner to corner at an equal spacing of 1.2m apart to play a game.
Just before the game, 7 of them had to leave and help their teacher with some chores. As a result, the remaining scouts had to line up along the same side of the Assembly Ground at a new equal spacing.
What was the new spacing between 2 scouts?

Q13. Hannah collected $6720 from the sale of some dresses and blouses. The ratio of the price of a dress to the price of a blouse is 5:1. Each blouse costs $5. Even the total number of blouses sold made up 20% of the total number of dresses and blouses sold, how many dresses were sold by Hannah?

Q15. The figure below shows Tap A, Tap B and an empty tank with a capacity of 96.8 litres. Water flows from Tap A at 6.4 litres per minute and Tap B 5.6 litres per minute.
Tap A was turned on first. Tap B was turned on 2 minutes later. The taps were turned off at the same time when the tank was completely full without overflowing.
How much water flowed from Tap B?

My DD answer:
Tap A, 2 mins – 6.4l X 2 = 12.8l
Both taps, 3 mins – 12.8l + 6.4l + 5.6l = 24.8l
At 4 mins – 24.8l + 12l = 36.8l
At 5 mins – 36.8l + 12l = 48.8l
At 7 mins – 48.8l + (12l X2) = 72.8l
At 9 mins – 72.8l + 24l = 96.8l

Tap B – (9 mins – 2 mins) X 5.6l = 39.2l

Is there a shorter way to answer this Q?

Thanks!

Hi,


Would like to check the rate for Minor Repairs Expenses for:

2 bedroom - S$150
3 bedroom - S$200
4 bedroom - ?

Was told by agent this is current market rate. However, this rate has been in the market for several years already. Anyone managed to revise the amount upwards in view of inflation?

Mum8282