## Q&A - PSLE Math

### Re: Q&A - PSLE Math

[quote="MrKiasuAllTheWay"]A bus can have a maximum of 42 children or 36 adults.

Given that there are already 28 children and 8 adults in the bus, what is the greatest numbers of adults that can board the bus ?

To solve the question, we have to understand that the 'mass' (which is unstated) is the same for the 42 children and 36 adults. We can then solve the question using the unitary method.

42u=36p

7u=6p

In place of 7 children can be six adults. So, 28 divided by 7u is 4. 4 multiplied by 6 is 24(the exchange of the 28 children for adults). 36 adults is the maximum capacity of the bus. So, we shall take 36-24-8=4(The answer)

Hope my explanation was detailed enough.[/quote]

Thank you !

The explanation is clear for us.

Given that there are already 28 children and 8 adults in the bus, what is the greatest numbers of adults that can board the bus ?

To solve the question, we have to understand that the 'mass' (which is unstated) is the same for the 42 children and 36 adults. We can then solve the question using the unitary method.

42u=36p

7u=6p

In place of 7 children can be six adults. So, 28 divided by 7u is 4. 4 multiplied by 6 is 24(the exchange of the 28 children for adults). 36 adults is the maximum capacity of the bus. So, we shall take 36-24-8=4(The answer)

Hope my explanation was detailed enough.[/quote]

Thank you !

The explanation is clear for us.

### Re: Q&A - PSLE Math

[quote="Kangkangteo"][quote="Leewk"]Please help.

A bus can have a maximum of 42 children or 36 adults.

Given that there are already 28 children and 8 adults in the bus, what is the greatest numbers of adults that can board the bus ?

The answer is '4' but I don't have the solution.[/quote]

42 C ---> 36 A

28 C ---> 36/42 x 28 = 24 A

28 C + 8 A ---> 24 A + 8 A = 32 A

36 A - 32 A = 4 A (ans)[/quote]

Thank you !

A bus can have a maximum of 42 children or 36 adults.

Given that there are already 28 children and 8 adults in the bus, what is the greatest numbers of adults that can board the bus ?

The answer is '4' but I don't have the solution.[/quote]

42 C ---> 36 A

28 C ---> 36/42 x 28 = 24 A

28 C + 8 A ---> 24 A + 8 A = 32 A

36 A - 32 A = 4 A (ans)[/quote]

Thank you !

### Re: Q&A - PSLE Math

Thank you, Tianzhu!!!tianzhu wrote:Hi cmmcmm wrote:Pls help

Good Evening.

A similar question has been discussed earlier on page 1204.

Wishing you a very successful PSLE 2014.

Best wishes

### Re: Q&A - PSLE Math

Hi, This question was answered earlier. But the working is not clear. Can someone explain how to solve this ?.

Thank you.

### Re: Q&A - PSLE Math

Hi, one question, just to ensure, thks.

Two different tanks, A and B, were filled with water. If tank A leaked 10ml of water each hour and Tank B leaked 5 ml of water each hour, Tank A would still have 300 ml of water left when Tank B became empty. If Tank A leaked 5ml of water each hour and Tank B leaked 10ml of water each hour, Tank A would still have 750 ml of water left when Tank B was empty.

How much water was there in Tank A at first?

Two different tanks, A and B, were filled with water. If tank A leaked 10ml of water each hour and Tank B leaked 5 ml of water each hour, Tank A would still have 300 ml of water left when Tank B became empty. If Tank A leaked 5ml of water each hour and Tank B leaked 10ml of water each hour, Tank A would still have 750 ml of water left when Tank B was empty.

How much water was there in Tank A at first?

### Re: Q&A - PSLE Math

Hi AwonderAwonder wrote:Hi, one question, just to ensure, thks.

Two different tanks, A and B, were filled with water. If tank A leaked 10ml of water each hour and Tank B leaked 5 ml of water each hour, Tank A would still have 300 ml of water left when Tank B became empty. If Tank A leaked 5ml of water each hour and Tank B leaked 10ml of water each hour, Tank A would still have 750 ml of water left when Tank B was empty.

How much water was there in Tank A at first?

Good Morning.

This question question has been discussed earlier on page 1191.

Wishing you a very successful PSLE 2014.

Best wishes

### Re: Q&A - PSLE Math

I classified this type question as Time-Speed Question. It is the same as Number-Value Question. Once you know how to draw the table, you will have the answer.

http://i60.tinypic.com/1ggmbo.jpg

http://i60.tinypic.com/1ggmbo.jpg

Last edited by Dr. Peng on Fri Oct 03, 2014 10:59 pm, edited 2 times in total.

### Re: Q&A - PSLE Math

Is the answer 123.25 sqcm?vsk wrote:

Hi, This question was answered earlier. But the working is not clear. Can someone explain how to solve this ?.

Thank you.

- Kangkangteo
- BlueBelt
**Posts:**345**Joined:**Sun May 11,**Total Likes:**1

### Re: Q&A - PSLE Math

Yes.Laurel111 wrote:Is the answer 123.25 sqcm?vsk wrote:

Hi, This question was answered earlier. But the working is not clear. Can someone explain how to solve this ?.

Thank you.

### Re: Q&A - PSLE Math

Please help on this.. I couldnt figure out why the answer is y2/16 cm2.

Thank you in advance, kind one.

A Robe is y cm long. a steel rod is 1/3 as long as the rope.

Question: If the rope is used to form a square, whats the area of the square in terms of y ?

Thank you in advance, kind one.

A Robe is y cm long. a steel rod is 1/3 as long as the rope.

Question: If the rope is used to form a square, whats the area of the square in terms of y ?