Q&A - PSLE Math

[Michaelia0816]

Pls help, quite urgent, cannot understand what this question saying,


http://t.co/zaxc2Izu

[MathIzzzFun]

dicoyote:

Hi,


Need help on these question:


2) The ratio of the number of apples to the number of oranges in Box A is 4:1 while that in Box B is 3:2. Box A has thrice as many fruits as Box B. When 14 oranges are transferred from Box A to Box B, the number of oranges in Box A is 7/8 of the number of oranges in Box B. Find the number of apples in Box A at first.

Thanks in advance

At first,
Apples in B : Oranges in B = 3 : 2 --> 9u : 6u --- total 15u
Apples in A : Oranges in A = 4 : 1 --> 36u : 9u --- total 45u

In the end,
Oranges in A : Oranges in B = 7:8 --> 7u : 8u

Oranges transferred from A to B = 9u - 7u = 2u --> 14
Apples in A, at first --> 36 x 14/2 = 252

cheers.

[MathIzzzFun]

dicoyote:

Hi,


Need help on these question:

1) Chris and Diane have some carnival tickets. If Chris sells 10 tickets per day and Diane sells 5 tickets per day. Chris will have 40 tickets left when Diane has sold all her tickets. If Chris sells 5 tickets per day and Diane sells 10 tickets per day, Chris will have 70 tickets left when Diane has sold all her tickets.
a) How many tickets does Chris have?
b) If each ticket is sold for $20, how much money can be collected from the sale of all their tickets?

For (a), I am trying to use algebra, but could not figure out after having the days as \"x\"

10x+40=5x
5x+70=10x.....is this correct?

Thanks in advance

hope this helps..

http://i50.tinypic.com/34s34es.png\">

http://i46.tinypic.com/2zi4pbl.png\">

cheers.

[verykiasumummy]

charsen:

verykiasumummy:

hi charsen,


r u a tutor or teacher?

Refer to your Private Im just a psle student. Pls bear with any wrong answers ad im also learning.

it is remarkable to see u able to ans in both math n sci... my eldest is just 1 yr older than u... but i dun allow them to use the com to chat in forum.. haha..

[kay22]

Can Someone help with this qn??? :roll:


http://i46.tinypic.com/2w3yi9x.jpg\">

[Be a mom]

http://i49.tinypic.com/16p0f7.jpg\"> Hi, Pls help on this question!!!!

[dicoyote]

MathIzzzFun:

dicoyote:

Hi,


Need help on these question:

1) Chris and Diane have some carnival tickets. If Chris sells 10 tickets per day and Diane sells 5 tickets per day. Chris will have 40 tickets left when Diane has sold all her tickets. If Chris sells 5 tickets per day and Diane sells 10 tickets per day, Chris will have 70 tickets left when Diane has sold all her tickets.
a) How many tickets does Chris have?
b) If each ticket is sold for $20, how much money can be collected from the sale of all their tickets?

For (a), I am trying to use algebra, but could not figure out after having the days as \"x\"

10x+40=5x
5x+70=10x.....is this correct?

Thanks in advance

hope this helps..

http://i50.tinypic.com/34s34es.png\">

http://i46.tinypic.com/2zi4pbl.png\">

cheers.

Hi MathIzzzFun,

Thanks for your help, appreciate it

Regards

[MathIzzzFun]

kay22:

Can Someone help with this qn??? :roll:


http://i46.tinypic.com/2w3yi9x.jpg\">

http://tinyurl.com/mathizzzfun-2012Prelim-RSP2Q3

cheers.

[MathIzzzFun]

Be a mom:

http://i49.tinypic.com/16p0f7.jpg\"> Hi, Pls help on this question!!!!

Remainder --> 11 units
Original amount of money --> 11 units + $1155

Amount left = 11 units - 2 units - $175 = 9 units - $ 175
Amount left = 1/11 original amount --> 1 unit + $105
9 units - $175 = 1 unit + $ 105
1 unit --> $ 35

Amount spent on bag --> $70
original amount of money --> 11 x $35 + $1155 = $1540
... can you work out the solution from here ?

cheers.

[tianzhu]

Spongy:

Please help me in some questions. Thanks in advance!!!


1. A box contains 40 similar writing pads. The total mass of box with 3/5 of its contents is 0.88kg lighter than the box with all its contents. The mass of each writing pad is 4/5 times the mass of the box. Find the total mass of the box of writing pads. Give your answer in grams.

2. A train, 135m long travels at a constant speed of 15m/s. The train entered a tunnel which 4365m long at 12pm. Point B is the end of the tunnel.
(a) What time will it be for the entire train pass through the tunnel?
(b)What is the distance from point B to the next station if the train reaches the next station at 12.12pm.

Hi

(1)

3/5 of 40 -------- 24

16 writing pads ------- 880g

1 writing pad ------ 55g


Mass of box ------ 68.75g

The total mass of the box of writing pads -------- 68.75 + 40(55) ------- 2268.75g

(2)

Time taken to pass through tunnel ------- 4365+135/15 -------- 300s (5min)

Train passed through [email protected]

In 7min, the train covered 7*60*15 -------- 6300m

Distance from B to the next station(rear end of train@platform) ------ 6300m.

Best wishes.