Q&A - PSLE Math

[Brenda10]

Vanilla Cake:

Brenda10:

Hi Vanilla Cake


DD answer is Option 2. She said there was a one in the center shap out and the last one should not leave a gap otherwise it will create problem (soemthing like overlap) when continuous to tessellate.

Thank you

Hi Brenda10,
Thks for your reply but she was still not convinced that the answer was option 2. Hope that someone will be able to scan the diagram for this question and post it in KSP forum.

Have your DD tried Rosyth 2010 P6 CA1 Maths - Paper 2 Q11? The answer for the average height of the 3 girls is 304 cm. 304 cm is not a realistic figure in the real world.

Here's the question:
The ratio of Amy's height to Betty's height is 1:2. The ratio of Betty's height to Carmen's height is 3:5. Betty is 144 cm taller than Amy. What is the average height of the 3 girls?

Dear VC,

OIS. You're right that 304cm is not realistic. However, I did not check in details so long as DD answer is matching with the answer key. Thank you for your highlight.

Off topic, there is one MCQ in Kong Kwa 2010 CL CA1 Q6 answer should be option 2 instead of option 4. I think the answer key provided wrongly. You may want to have a look.

Thank you.

[Vanilla Cake]

Brenda10:

Off topic, there is one MCQ in Kong Kwa 2010 CL CA1 Q6 answer should be option 2 instead of option 4. I think the answer key provided wrongly. You may want to have a look.Thank you.

Here's the question from P6 Kong Hwa Maths CA1 2010 Paper Q6:

Joshua swam 2000 m yesterday. Luke swam 400 m less than Joshua. Find the ratio of the distance swam by Joshua to the total distance swam by Joshua and Luke.

Options:
(1) 2000:400
(2) 2000:1600
(3) 2000:2400
(4) 2000:3600

Answer given was option 4 which was correct.

Workings
Distance that Joshua swam = 2000 m
Distance that Luke swam = 2000 m - 400 m = 1600 m
Total distance swam by Joshua and Luke = 2000 m + 1600 m = 3600 m
Ratio of the distance swam by Joshua to the total distance swam by Joshua and Luke = 2000:3600
ie option (4).

Thks.

[Vanilla Cake]

Hi Brenda10,


Could you pls visit P6 Nanyang Maths CA1 2010 Paper 2 Q11 [4 marks].
Answer for part (b) should be 150 degree and not 105 degree as given.
Pls kindly check and confirm.

Thks for your valuable time and effort.

[Brenda10]

Vanilla Cake:

Brenda10:

Off topic, there is one MCQ in Kong Kwa 2010 CL CA1 Q6 answer should be option 2 instead of option 4. I think the answer key provided wrongly. You may want to have a look.Thank you.

Here's the question from P6 Kong Hwa Maths CA1 2010 Paper Q6:

Joshua swam 2000 m yesterday. Luke swam 400 m less than Joshua. Find the ratio of the distance swam by Joshua to the total distance swam by Joshua and Luke.

Options:
(1) 2000:400
(2) 2000:1600
(3) 2000:2400
(4) 2000:3600

Answer given was option 4 which was correct.

Workings
Distance that Joshua swam = 2000 m
Distance that Luke swam = 2000 m - 400 m = 1600 m
Total distance swam by Joshua and Luke = 2000 m + 1600 m = 3600 m
Ratio of the distance swam by Joshua to the total distance swam by Joshua and Luke = 2000:3600
ie option (4).

Thks.

Dear VC

This question we have no issue. We got the same answer too.

What I menat is the CL Paper Q6.

As the other NY question, will let dd try once she wake up.

Thank you

[Vanilla Cake]

Brenda10:

Dear VC


This question we have no issue. We got the same answer too.

What I menat is the CL Paper Q6.

As the other NY question, will let dd try once she wake up.

Thank you

Dear Brenda10,

I am sorry for not reading your question carefully.
:stupid:
Yes, the correct answer for Q6 should be option 2 - 家境 and not option 4 - 四周.

Thks for your understanding.

[Brenda10]

Vanilla Cake:

Hi Brenda10,


Could you pls visit P6 Nanyang Maths CA1 2010 Paper 2 Q11 [4 marks].
Answer for part (b) should be 150 degree and not 105 degree as given.
Pls kindly check and confirm.

Thks for your valuable time and effort.

Dear VC

Yes. DD worked out the answer also 150 degree for (b).

She said the two angels of triangle PVQ (left and right) are 15 degree each, as such 180 - 15 - 15 = 150 degree

Thank you.

[Brenda10]

Vanilla Cake:

Dear Brenda10,


I am sorry for not reading your question carefully.
:stupid:
Yes, the correct answer for Q6 should be option 2 - 家境 and not option 4 - 四周.

Thks for your understanding.

Dear VC

Is ok. Don't worry.

So glad that we can verify wtih each other when there is doubt.

Thank you and have a nice day.

[Vanilla Cake]

Dear Brenda10,


Sorry to bother you again. Could you pls request DD to check on CHIJ St. Nicholas Girls Pri 2010 P6 CA1 Paper 2 Q3 [2 marks]?
Answer given was 1¼ m² but my younger sister thought that it should be 5/12 m².

and

also under the same paper - Paper 1 Q23 [1 mark].
Answer given was incorrect -> 0.050 ml.
It should be 1/20 litre or 0.05 litre.

Off topic - P6 English 2010 CA1 - Kong Hwa School.
Q11 - Answer given -> option 3. Why?
Is the correct answer - Option 4? Pls advise.

Thks for your time and reply.

[Brenda10]

Vanilla Cake:

Dear Brenda10,


Sorry to bother you again. Could you pls request DD to check on CHIJ St. Nicholas Girls Pri 2010 P6 CA1 Paper 2 Q3 [2 marks]?
Answer given was 1¼ m² but my younger sister thought that it should be 5/12 m².

and

also under the same paper - Paper 1 Q23 [1 mark].
Answer given was incorrect -> 0.050 ml.
It should be 1/20 litre or 0.05 litre.

Off topic - P6 English 2010 CA1 - Kong Hwa School.
Q11 - Answer given -> option 3. Why?
Is the correct answer - Option 4? Pls advise.

Thks for your time and reply.

Dear VC

You're welcome. DD's answers are as follow:

CHIJ St. Nicholas Maths 2010 CA1 P2 Q3

Working
8m - (1/2m x 6) = 5m
5m /2 = 2.5 m (lenght of each rectangle)
2.5 x 0.5 = 1.25m²

Answer: 1.25m² mean same with the answer key 1¼ m²

CHIJ St. Nicholas 2010 Maths CA1 P1 Q23
Answser: 1/20 litre (Different with the answer key of 0.050 ml)



Kong Hwa 2010 EL CA1 Q11
Her answer was also Option 3 (are prepared) that same with the answer key provided.
According to her, All is the reference and one is for information only

Hope the above useful.

Thank you

[Brenda10]

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