Q&A - PSLE Math

[Mary Joy]

hi everyone,


I have a speed problem sum to solve.Please help me.

1.Henry took 4h to travel from A to B.Daniel took 6h to travel from B to A.When they meet,they were 1.2 km away from the midpoint.How far is the distance between A to B?

:thankyou: :lovesite:

[NYPSkiasuparent]

There are some boys and girls in the indoor sports hall. 1/2 of the number of boys in the indoor sports hall is the same as 60% of the number of girls. If there are 25 more boys than girls in the indoor sports hall, how many children are there altogether?

[PapayaDad]

There are some boys and girls in the indoor sports hall. 1/2 of the number of boys in the indoor sports hall is the same as 60% of the number of girls. If there are 25 more boys than girls in the indoor sports hall, how many children are there altogether?


B=2u
G=10p

1/2 of the number of boys in the indoor sports hall is the same as 60% of the number of girls:

u=6p

there are 25 more boys than girls:

[–u—] ; [—u—] : Boys
[pppppp] ; [pppp][25] : Girls

2p=25
10p=125 (girls)
boys = 125 +25 = 150

[Oldschool]

Mary Joy:

hi everyone,


I have a speed problem sum to solve.Please help me.

1.Henry took 4h to travel from A to B.Daniel took 6h to travel from B to A.When they meet,they were 1.2 km away from the midpoint.How far is the distance between A to B?

:thankyou: :lovesite:

Hi,

Speed Ratio,
H : D
6U : 4U

At time t, they met so

6Ut + 4Ut = AB
10Ut = AB, and

6Ut - 4Ut = 2.4
2Ut = 2.4
10Ut = 12km = AB

Regards

[NYPSkiasuparent]

Joey has some red and blue beads.

If she buys another 15 red beads, the percentage of the red beads she has become 30%.
If she gives away 20 blue beads, the percentage of the blue beads she has becomes 76%.
However many red beads and blue beads do Joey have?

[Mary Joy]

Oldschool:

Mary Joy:

hi everyone,


I have a speed problem sum to solve.Please help me.

1.Henry took 4h to travel from A to B.Daniel took 6h to travel from B to A.When they meet,they were 1.2 km away from the midpoint.How far is the distance between A to B?

:thankyou: :lovesite:

Hi,

Speed Ratio,
H : D
6U : 4U

At time t, they met so

6Ut + 4Ut = AB
10Ut = AB, and

6Ut - 4Ut = 2.4
2Ut = 2.4
10Ut = 12km = AB

Regards

thank you for your detailed explanation
:thankyou:

[Oldschool]

NYPSkiasuparent:

Joey has some red and blue beads.

If she buys another 15 red beads, the percentage of the red beads she has become 30%.
If she gives away 20 blue beads, the percentage of the blue beads she has becomes 76%.
However many red beads and blue beads do Joey have?

Hi

http://www.kiasuparents.com/kiasu/forum/viewtopic.php?p=997662#p997662

Regards

[ngl2010]

May I know how you search whether a question has been posted before?

[Oldschool]

ngl2010:

May I know how you search whether a question has been posted before?

Hi,

Just scroll up and just beneath the \"contact us\" you will see a small magnifying glass - Search\" function.

Regards

[ngl2010]

Oldschool:

ngl2010:

May I know how you search whether a question has been posted before?

Hi,

Just scroll up and just beneath the \"contact us\" you will see a small magnifying glass - Search\" function.

Regards

Thank you.
:thankyou: