Tutor MathsGuru: Ask me for your burning Maths questions!

[tianzhu]

Hiroii-kun:

Hi this is a p4 qn.

is it solvable? seems like lack of info to me

Mrs Lim bought 12 pears and 4 apples. Mrs Tan bought 12 apples and 4 pears.
Mrs Tan paid $1.60 less than Mrs Lim. How much did a pear cost ?

Hi

From your question, we can tell that a pear costs 20 cents more than an apple.

Some information is missing, perhaps the cost of an apple?

Best wishes.

[Hiroii-kun]

tianzhu:

Hiroii-kun:

Hi this is a p4 qn.

is it solvable? seems like lack of info to me

Mrs Lim bought 12 pears and 4 apples. Mrs Tan bought 12 apples and 4 pears.
Mrs Tan paid $1.60 less than Mrs Lim. How much did a pear cost ?

Hi

From your question, we can tell that a pear costs 20 cents more than an apple.

Some information is missing, perhaps the cost of an apple?

Best wishes.

yeah i also feel that there is some missing info
the best i can find is also the pear cost 20 cents more
thanks anyway!

[pineapple tarts]

tianzhu:

pineapple tarts:

Sorry, it should be Peter has 5 times as many as John.

David and Peter have 108 stamps. David and John have 44 stamps. Peter has 5 times as many stamps as John. How many stamps does Peter have?

Hi

You may wish to use MD.

In both scenarios, David’s number of stamps remains the same.

The difference between Peter and John is 4 units.

108 – 44 --- 64

4 units --- 64
1 unit --- 16

5 units --- 80

Peter has 80 stamps.

Best wishes

Dear tianzhu,

thank you very much for your help. I keep on using 64 divide by 6 cos Peter has 5 times as many as John. How do I explain to my child??? :?

[tianzhu]

pineapple tarts:

Dear tianzhu,
thank you very much for your help. I keep on using 64 divide by 6 cos Peter has 5 times as many as John. How do I explain to my child??? :?

Hi

Hope this helps.

Best wishes

http://farm2.static.flickr.com/1440/5098695397_3e5da57c85_b.jpg\">

[Daddy]

Hi,


I have 2 qn to ask. Thanks

1. A digital camera was selling at $480. After giving 20% discount, Kenny made an extra 20%. Find the cost price of the camera.


2. Junyang’s saving and Weiming’s saving are in the ratio of 3:8. If Weiming’s saving is decreasing by 25%, their total saving will be $300. How much is Junyang’s saving at first?

Thankss

[iFruit]

Daddy:

Hi,


I have 2 qn to ask. Thanks

1. A digital camera was selling at $480. After giving 20% discount, Kenny made an extra 20%. Find the cost price of the camera.


2. Junyang's saving and Weiming's saving are in the ratio of 3:8. If Weiming's saving is decreasing by 25%, their total saving will be $300. How much is Junyang's saving at first?

Thankss

1.

Selling price of camera = 8/10 x 480 = 384 (20% discount)

cost price = 10/12 x 384 = $320 (20% profit)

2.

Let Junyang's savings = 3u
Weiming's savings = 8u

After decreasing by 25%, Weiming's savings = 75/100 *8u = 6u

3u+6u = 9u = 300

Junyang's saving at first = 3u = 3 * 300/9 = $100


HTH

[pineapple tarts]

thank you very much tianzhu. It really helps a lot.

[tianzhu]

pineapple tarts:

thank you very much tianzhu. It really helps a lot.

Hi

You're welcome.

Best wishes

[Daddy]

Thank you iFruit

[ck123]

Anyone tried 2009 SCGS SA2 paper 1 Q28?


Question is:

The following figure shows a square piece of cardboard WXYZ. Four small squares of equal size and a circle, twice the area of each small square, were cut out from the cardboard. What percentage of the cardboard was cut out?

sorry but i don't know how to insert the diagram. Anyone came across this question? Please help :?:

Thanks