## Q&A - PSLE Math

### Re: Q&A - PSLE Math

Hi,

Help. please!

-----------

Ahmad and Halim together took 5 days to paint their house. If Ahmad and Halim work together for 2 days, followed by Ahmad working alone for 8 days, Halim will take 1 more day to complete the remaining work. How long will Ahmad take to paint the house all by himself?

Ans given: 17.5 days

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Thanks in advance!

Help. please!

-----------

Ahmad and Halim together took 5 days to paint their house. If Ahmad and Halim work together for 2 days, followed by Ahmad working alone for 8 days, Halim will take 1 more day to complete the remaining work. How long will Ahmad take to paint the house all by himself?

Ans given: 17.5 days

-----------

Thanks in advance!

### Re: Q&A - PSLE Math

acehkr3009 wrote:Hi,Oldschool wrote:Hi,acehkr3009 wrote:Hi all,

Will need help on finding the area of the unshaded triangle.

Thanks.

Can you find the area of triangle from here?

Regards

Thanks for the reply.

The triangles are not stated as right angle triangle.

Is it possible to have isosceles triangles inside this quadrant that may not be right angle?

If so, then not too sure how to find area of the triangles....please advise...thks

Hi,

Yes, it is possible to have iso. triangle inside the quadrant that is not a right angle triangle.

So, you have a valid point here. If the iso. triangle is not a rt. angle triangle (since it is stated that is not drawn to scale) them there would be infinite answers.

Regards

### Re: Q&A - PSLE Math

Thanks. Ratio is one of my worst topics.tianzhu wrote:Hi ksdad28ksdad28 wrote:The ratio of the number of fishes to the number of frogs in a pond is 3:5. After 6 frogs left the pond, there were 6/7 as many fishes as frogs. How many fishes and frogs were there altogether in the pond at first?

TIA for helping.

Good Morning

Hope this helps.

Best wishes

- speedmaths.com
- BrownBelt
**Posts:**559**Joined:**Mon Oct 12,**Total Likes:**3

### Re: Q&A - PSLE Math

Hi bangs,bangs wrote:Hi,

Help. please!

-----------

Ahmad and Halim together took 5 days to paint their house. If Ahmad and Halim work together for 2 days, followed by Ahmad working alone for 8 days, Halim will take 1 more day to complete the remaining work. How long will Ahmad take to paint the house all by himself?

Ans given: 17.5 days

-----------

Thanks in advance!

Please see the page below.

http://www.kiasuparents.com/kiasu/forum ... start=3830

Please let us know if you still need help.

Cheers

**speedmaths.com**

.

### Re: Q&A - PSLE Math

1A +1H ---------- 1/5 of the house painted in 1 daybangs wrote:Hi,

Help. please!

-----------

Ahmad and Halim together took 5 days to paint their house. If Ahmad and Halim work together for 2 days, followed by Ahmad working alone for 8 days, Halim will take 1 more day to complete the remaining work. How long will Ahmad take to paint the house all by himself?

Ans given: 17.5 days

-----------

Thanks in advance!

2day of (Ahamed + Halim) 2A+ 2H ----- 2/5 of the works done.

Remaining paint work 5/5 – 2/5 = 3/5

3 / 5 works -------- A8 days + H 1 day

1day of A + 1 day of H = 1/5 of the house painted --------(1)

8day of A + 1 day of H = 3/5 of the house painted --------(2)

(2) –(1) = 7 day of A = 2/5 of the house paint work

5/5 of the house paint work by A = 5/2 X 7 = 17.5 days

Cheers

SPt

### Re: Q&A - PSLE Math

Here you goOldschool wrote:Hi,acehkr3009 wrote:Hi all,

Will need help on finding the area of the unshaded triangle.

Thanks.

Can you find the area of triangle from here?

Regards

Hi,

Area of the 2 Quadrant = π ×r² / 2

22/ 7 x 20 x 20 / 2 = 628. 57cm² (rounded off)

2 Area of Isosceles triangles = 1 Square

Quadrant Radius = Square diagonal of a Squre (20 cm)

Area of the Square using Diagonal = d²/2

20 x 20 / 2 = 200 cm²

Shaded parts = 628.57 – 200 = 428.57cm²

Cheers

Spt

### Re: Q&A - PSLE Math

Thanks for your help in solving and to speedmaths for directing me to a previous post on this same question. Much appreciated!sptamila wrote:1A +1H ---------- 1/5 of the house painted in 1 daybangs wrote:Hi,

Help. please!

-----------

Ahmad and Halim together took 5 days to paint their house. If Ahmad and Halim work together for 2 days, followed by Ahmad working alone for 8 days, Halim will take 1 more day to complete the remaining work. How long will Ahmad take to paint the house all by himself?

Ans given: 17.5 days

-----------

Thanks in advance!

2day of (Ahamed + Halim) 2A+ 2H ----- 2/5 of the works done.

Remaining paint work 5/5 – 2/5 = 3/5

3 / 5 works -------- A8 days + H 1 day

1day of A + 1 day of H = 1/5 of the house painted --------(1)

8day of A + 1 day of H = 3/5 of the house painted --------(2)

(2) –(1) = 7 day of A = 2/5 of the house paint work

5/5 of the house paint work by A = 5/2 X 7 = 17.5 days

Cheers

SPt

- marstolive
- BlueBelt
**Posts:**284**Joined:**Sun Jan 30,

### Re: Q&A - PSLE Math

A farmer had 160 more chickens than ducks.

After selling 3/4 of the ducks and 50% of the chickens, 230 chickens and ducks were left.

a. how many duck were left

b. what is the ratio of the number of chickens left to the number of ducks left? express your answer in its simplest form.

After selling 3/4 of the ducks and 50% of the chickens, 230 chickens and ducks were left.

a. how many duck were left

b. what is the ratio of the number of chickens left to the number of ducks left? express your answer in its simplest form.

### Re: Q&A - PSLE Math

Hi,marstolive wrote: A farmer had 160 more chickens than ducks.

After selling 3/4 of the ducks and 50% of the chickens, 230 chickens and ducks were left.

a. how many duck were left

b. what is the ratio of the number of chickens left to the number of ducks left? express your answer in its simplest form.

Cheers!!!

Spt

### Re: Q&A - PSLE Math

Hi, ps help. TIA

Mr Chen receives a fixed salary every month. He sets aside $500 for his son's monthly allowance, $1500 for family expenditure and saves the rest. When he increases his son's allowance by $64, his savings decreases by 8%. Find his monthly salary.

In an examination, Mary scored an average percentage of 80% for 4 subjects. She got 10 more marks in Chinese than in English. She scored 5 marks more in English than her maths and her science marks were 3/4 that of what she scored for English. How many marks did she score for each subject?

Mr Chen receives a fixed salary every month. He sets aside $500 for his son's monthly allowance, $1500 for family expenditure and saves the rest. When he increases his son's allowance by $64, his savings decreases by 8%. Find his monthly salary.

In an examination, Mary scored an average percentage of 80% for 4 subjects. She got 10 more marks in Chinese than in English. She scored 5 marks more in English than her maths and her science marks were 3/4 that of what she scored for English. How many marks did she score for each subject?