MathIzzzFun:

simple88:

Hi MathIzzzFun,

Thank you so much. Amazed how you can present it in such a way that is so much easier to comprehend than what my kid is taught in school. Sorry I have one more for you. Thanks alot.

Q)At first, Ah Jie only had oranges and Ah Siang only had apples. They gave each other half of their fruits. Ah Jie then sold 18 oranges and Ah Siang sold 8 apples. In the end, the ratio of the number of oranges to the number of apples Ah Jie had was 1:4 and the ratio of the number of oranges to the number of apples Ah Siang had was 1:3. How many oranges did Ah Jie have at first?

Hi

you can use MD, UP (unit/part) or cross-multiply method...

After selling 18 oranges,
Jie's oranges : apples --> 1u : 4u
Before selling the oranges, Jie's oranges : apples --> 1u + 18 : 4u

Siang had same number of oranges & apples
ie Siang's oranges : apples --> 1u + 18 : 4u

after selling 8 apples,
Siang's oranges : apples
--> 1u + 18 : 4u - 8
= 1 : 3

equalizing or cross-multiply:
3u + 54 = 4u -8
1u --> 62

number of oranges Jie had at first --> (62 +18)x2 = 160

cheers.

Hi,
I have problem understanding this part where you mentioned
'Siang had same number of oranges & apples
ie Siang's oranges : apples --> 1u + 18 : 4u'.

How do you know that Siang had same number of oranges & apples to form this ratio?

Thanks.

Hi MathIzzzFun,

Thank you so much. Amazed how you can present it in such a way that is so much easier to comprehend than what my kid is taught in school. Sorry I have one more for you. Thanks alot.

Q)At first, Ah Jie only had oranges and Ah Siang only had apples. They gave each other half of their fruits. Ah Jie then sold 18 oranges and Ah Siang sold 8 apples. In the end, the ratio of the number of oranges to the number of apples Ah Jie had was 1:4 and the ratio of the number of oranges to the number of apples Ah Siang had was 1:3. How many oranges did Ah Jie have at first?

Hi, I need help with this question. Thanks in advance.


Kelvin had between $30 and $40 in $1 coins and 50cent coins. The ratio of the number of $1 coins to the number of 50cent coins was 1:3. He exchanged some $1 coins for 50cent coins. The ratio of the number of $1 coins to 50cent coins then became 1:5.
Find a) the total number of money that Kelvin had, b) the number of $1 coins which were exchanged for 50cent coins.

Sorry, here’s the question.


Karen would love to join her friends for a movie. She cannot finish her homework in time.

Much as _______________________________________.

Hi,


Can someone help me with the following S&T question?

My DD’s teacher says only 1st one is acceptable, but I thought both are acceptable.

1. Much as she would love to join her friends for a movie, Karen cannot finish her homework in time.
2. Much as Karen would love to join her friends for a movie, she cannot finish her homework in time.

TIA.

Dear MathIzzzFun,


Thank you so much for your help.

Hi,


Can someone help me with the following question? Besides using the guess and check method, is there any other method that is less time consuming?

Mr Gopal purchased a certain number of shirts. He bought 11 small-sized shirts at $24 each and the large-sized shirts at $27 each. If the average cost of all the shirts was $25.35, how many large-sized shirts did he buy?

Thank you in advance.

Hi,


Can someone advise on the S&T questions?

1. "Ahmad, have you brought the robot we built yesterday?" Ryan asked.
Ans : Ryan asked Ahmad if he had brought the robot they (had) built the previous day.

Is it necessary to include ‘had’ after ‘built’ ?

2. Ravi will not be able to go swimming. It is still raining.
Ans: Ravi will not be able to go swimming unless it stops raining.

Is the following form acceptable?

Ravi will be able to go swimming unless it is still raining.

Kindly advise. Thank you.

Hi Tianzhu and MathIzzzFun,


You both have been most helpful. Thank you very much!

Hi,

I need help on a ratio question. Please let me know what is the best method to tackle the question. I couldn’t comprehend the answer provided. If it has been asked before, plse kindly direct me. Thanks.

ACS 2011 SA1 Paper 2 Q17
Grandma had some yellow and purple sweets in the ratio of 9:7. On Monday, she makes 54 more yellow sweets. On Tuesday she gave away 44 purple sweets and sold 129 yellow sweets. The number of yellow sweets to the number of purple weets became 6:5. How many yellow sweets are there in the end?