Q&A - PSLE Math

[tianzhu]

small:

Please help on another question and once again many thanks.


Sigh, I only know to solve it in algebra method.

Question: A box of apples is shared among some people. If each person gets 5 apples, there will be 4 apples left. If each person gets 6 apples, there will be a shortage of 5 apples. How many people are there? My answer is 9 people

Hi small

This is a question on “Excess and shortage”.
Some may call it “Gap and Differences” concept.

I've posted solutions to some similar questions in page 65 of this thread.

http://www.kiasuparents.com/kiasu/forum/viewtopic.php?t=149&postdays=0&postorder=asc&start=640

Gap ----- 5+4 ------9
Difference ------6 - 5 ------1

Number of people ------9/1 -------9

You may also solve this question with \"Making a systemmatic list\".

1) List down the multiples of 5

2) List down the multiples of 5 + 4

3) List down the multiples of 6

4) List down the multiples of 6 - 5

5) Find the common number in (2) and (3)

Best wishes

[tianzhu]

Belle2011:

(2) The lengths of 2 rectangles are 11m and 19m respectively. Their total area is 321m2. What is the difference in their areas?

Hi

Where is this question from?
There are two answers.

Use Guess and Check/listing.

The first answer

24*11 ----- 264
3*19 ----- 57

Difference -----207

The second answer

5*11 ----- 55
14*19 ---- 266

Difference ------211

Best wishes

[small]

tianzhu:

Belle2011:

(3) A group of people went hunting. On the average, 6 people hunted 5 rabbits, 15 people hunted 2 deer and 10 people hunted 1 buffalo. The total number of animals hunted was 6 more than the total number of people who went hunting. How many people went hunting?

Hi

I've posted this solution in one of my previous posts.

Hope this helps.

Best wishes.

http://farm3.static.flickr.com/2755/4368482573_272e22a4bb_o.jpg\">

Tianzhu,

Thanks for the solution...dumb me....

[tianzhu]

Hi


Hope this helps.

Best wishes

http://farm6.static.flickr.com/5220/5409162500_ed845b8002_b.jpg\">

[Belle2011]

Hi small and tianzhu,

For (1) on premier seats, my mum got the same answer as small but I got the answer same as tianzhu. She was unsure that a hall has 600 seats can have 900 premier seats…
These questions are from a worksheet given by my teacher.
Thank-you.
Cheers,
Belle.

[tianzhu]

Belle2011:

Hi small and tianzhu,

For (1) on premier seats, my mum got the same answer as small but I got the answer same as tianzhu. She was unsure that a hall has 600 seats can have 900 premier seats...
These questions are from a worksheet given by my teacher.
Thank-you.
Cheers,
Belle.

Hi Belle2011

The correct answer is 900.

There is nothing in the question which suggests that the hall has a maximum capacity of 600.

The question asks for the number of additional premier seats to increase its percentage to 70%.This suggests that there is room for further expansion.

Do not think too much about the space constraints in this instance,this is beyond the scope of this question, just base on the percentage concept to answer this question.

Happy New Year.

Best wishes

[Belle2011]

Dear tianzhu,

Thanks very much.
Happy Chinese New Year to you.

Cheers,
Belle.

[tianzhu]

Belle2011:

Dear tianzhu,

Thanks very much.
Happy Chinese New Year to you.

Cheers,
Belle.

Hi Belle2011

You're welcome.

学习进步, 金榜题名, 身体健康

Best wishes

[Belle2011]

Dear Mr James Ang,

May I know how to solve the below problem?

Jean is a hairdresser. She receives a fixed basic salary each month. She also receives a commission of 15% per hair service done. Last year, the average amount that she received for her hair services per month was $2,400. If her earnings was $17,520 last year, find her monthly fixed basic salary.
(source: PSLE Revision paper 4; answer is $1100).

Thank-you.

Cheers,
Belle.

[woodlands mama]

What about questions like this? Any good books to assist :roll: ?


1. Julian had 300 more cards than Faizal. Julian gave 3/5 of his cards to Faizal. Faizal than gave 1/4 of the total number of what he had then to Julian. In the end, Faizal had 300 more cards than Julian. How many cards did Julian have at first?