Q&A - PSLE Math

[Michaelia0816]

Thx, O meant just now is 432 /100 then * 80 disrupt my mind in confuse., thx

, is the answer just the word increase, I think so, so long, and again thank a million!

[tianzhu]

Michaelia0816:

Thx, O meant just now is 432 /100 then * 80 disrupt my mind in confuse., thx

, is the answer just the word increase, I think so, so long, and again thank a million!

Hi

The number of B's stamps was increased from 336 to 432.

You need to find the percentage increase.

Best wishes

[match3frog]

Hi :),


Need help on this question:

Aisha took 1/2 hour to walk from Village A to Village B at a uniform speed. Baoli took 3/4 hour to walk form Village B to Village A at a uniform speed. Both of them started at 2.20 p.m.
a)At what time did Aisha and Baoli pass each other along the way?
b) At the same time that Aisha reached Village B, Carol started to walk from Village A to Village B at the same uniform speed as Aisha. At what time did Baoli and Carol meet?

Thanks!:)

[MathIzzzFun]

match3frog:

Hi :),


Need help on this question:

Aisha took 1/2 hour to walk from Village A to Village B at a uniform speed. Baoli took 3/4 hour to walk form Village B to Village A at a uniform speed. Both of them started at 2.20 p.m.
a)At what time did Aisha and Baoli pass each other along the way?
b) At the same time that Aisha reached Village B, Carol started to walk from Village A to Village B at the same uniform speed as Aisha. At what time did Baoli and Carol meet?

Thanks!:)

Hi

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cheers.

[YumYum]

Hi, I need help with this Qn:


When a total of 12.5 litre of water is poured into Tank A and Tank B, the heights of the water level in both tanks are the same. The base area of Tank A is 300 cm2 whilst that of tank B is 200 cm2. Find the height of the water level in each tank.

Thanks

[tianzhu]

YumYum:

Hi, I need help with this Qn:


When a total of 12.5 litre of water is poured into Tank A and Tank B, the heights of the water level in both tanks are the same. The base area of Tank A is 300 cm2 whilst that of tank B is 200 cm2. Find the height of the water level in each tank.

Thanks

Hi

Base area of Tank A ------ 300 cm2

Base area of tank B ------ 200 cm2

Total base area ------ 500 cm2

1 litre ------- 1000 cm3

12500/500 ------ 25 cm

The height of the water level in each tank ------- 25 cm

Best wishes

[YumYum]

Thanks

[anneshirleygilbert]

Can somebody please help with this question?


Betina spent $20 on some stickers and bookmarks. She bought 6 times as many stickers as bookmarks. Each bookmark cost 30 cents more than a sticker. She spent $4 more on the stickers than on the bookmarks. What was the cost of a bookmark?

TIA.

[tianzhu]

anneshirleygilbert:

Can somebody please help with this question?


Betina spent $20 on some stickers and bookmarks. She bought 6 times as many stickers as bookmarks. Each bookmark cost 30 cents more than a sticker. She spent $4 more on the stickers than on the bookmarks. What was the cost of a bookmark?

TIA.

Hi

Amount spent on stickers ------ 12
Amount spent on bookmarks ------- 8

She bought 6 times as many stickers as bookmarks.

Bookmarks ------ 1 unit
Stickers ------- 6 units

Hence, 1 unit of stickers ------- 12/6 ------- 2

1 unit of bookmarks ------- 8

There is an extra of 6 (8-2) because the bookmark costs 30 cents more than a sticker.

Number of bookmarks ------- 600/30 ------ 20

Therefore cost of 1 bookmark -------- 800/20 ------- 40 cents.

Check

120*10 ------- 1200
20*40 ------ 800

Best wishes

[anneshirleygilbert]

Thanks alot, tianzhu. Forgot that we should compare one unit of bookmark with one unit of stickers so we can make use of the difference of $0.30 to find out how many bookmarks there are in 1 unit.


Many thanks, indeed. Have a good weekend!