Q&A - PSLE Math

[MathIzzzFun]

Spongy:

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



3. In the figure below, not drawn to scale, triangle ABG is a right-angled triangle. Find angle BAC.
http://i46.tinypic.com/xmr312.png\">

http://i47.tinypic.com/10nvr7b.png\">

angle EGF --> 1 unit
angle EFD --> 2 units
angle DEC --> 3 units
angle CDB --> 4 units
angle BCA --> 5 units
anlge BAC --> 5 units
angle EGF + angle BAC = 6 units --> 90 deg
1 unit --> 15 deg
angle BAC --> 75 deg

cheers.

[nounou]

Hi, please help to solve this Q.

Henry Park Prelim 2012 Q30. :?:

Susie wants to buy a handbag with her savings. If she increases her savings by 10% she will still need $14 more to buy the handbag. If she increases her savings by 45% she will have $7 in excess. What is the cost of the handbag? Answer given = $80
:thankyou: :thankyou: :thankyou:

[MathIzzzFun]

Treelodge:

Hi, please help to solve this Q.

Henry Park Prelim 2012 Q30. :?:

Susie wants to buy a handbag with her savings. If she increases her savings by 10% she will still need $14 more to buy the handbag. If she increases her savings by 45% she will have $7 in excess. What is the cost of the handbag? Answer given = $80
:thankyou: :thankyou: :thankyou:

145%-110% =35%
35% of savings --> $14 + $7 = $21

Bag --> 110% + $14 = 110/35 x $21 + $14 = $80

cheers.

[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