Thank you. Thank you.

My girl told me that her school teacher informed them that they are not allowed to make annotations and highlight on the question booklet. But throughout this year, they have been taught to highlight keywords in the questions. This helps to steer them towards answering to the question(s) asked and avoid careless mistakes.


I just made a call to the SEAB, and was also informed that there is no such instruction in the rule book.

Anyone heard of similar instruction in your kid’s school ?

thanks & cheers,
Shell

Hi


A neat way is to use MD.

Due to time constraints, I’ll work using units.

2/3 of the total value of the twenty-cent coins is the same as 1/2 of the total value of the fifty-cent coins.

Total value of twenty-cent coins ------ 3 units

Total value of fifty-cent coins ------ 4 units

If Beatrice spends 4 fifty-cent coins, the value of the twenty-cent coins and the value of the remaining fifty-cent coins will be the same.

4 fifty-cent coins ------- $2

4 units – 2 ------ 3 units

1unit ------- 2

Total value of twenty-cent coins ------ 3 units ------ $6

Number of twenty-cent coins ------- 30 (600/20).

Another way is to use “SL” and work in a tabulated list.

20 cents: 50cents ------- 3:4 ------- 6:8

8 - 2 ------ 6, hence the condition is satisfied.

Total value of twenty-cent coins ------ 3 units ------ $6

Number of twenty-cent coins ------- 30 (600/20)

Best wishes[/quote]

Thank You!!!! :boogie: :rahrah:

tianzhu:

shell:

[quote=\"tianzhu\"]
Dear Tianzhu,
This Q was found in Raffles Girls' 2012 prelim paper. I also cannot understand how to arrive at the answer. Greatly appreciate it if you can show me the steps. It would be most helpful. Cheerios, Shelby

Hi

Please help to confirm.

Is it 2/3 or 2/5?

Best wishes[/quote]it is 2/3

tianzhu:

Essential:

Can help this question urgently?

Beatrice has some twenty-cent and fifty-cent coins. 2/5 of the total value of the twenty-cent coins is the same as 1/2 of the total value of the fifty-cent coins. If Beatrice spends 4 fifty-cent coins, the value of the twenty-cent coins and the value of the remaining fifty-cent coins will be the same. How many twenty-cent coins does Beatrice have? Ans 30.

Hi

Please confirm with your source.

Based on number in your question(2/5),the answer can’t be 30.

2/5 out of $6 (30 number of twenty-cent coins) is $2.40 (cannot be ½ of the total value of the fifty-cent coins).

If it is 2/3, then the answer of 30 is logical.

20 cents ----- $6 (30)

50 cents ------ $8

Best wishes

Dear Tianzhu,
This Q was found in Raffles Girls' 2012 prelim paper. I also cannot understand how to arrive at the answer. Greatly appreciate it if you can show me the steps. It would be most helpful. Cheerios, Shelby