Q&A - PSLE Math

[Cockroach]

P5G:

Please help.



10. My mother ought to let me attend my friend's party, _________ ?

(1) won't she
(2) should she
(3) mustn't she
(4) shouldn't she


TIA.

My answer is 4

[tianzhu]

Hi kavisuresh


Just to check,the 2 and 6 on the net, are they written by you or from the worksheet?

Best wishes

[tianzhu]

smileplease:

How to do this Q....................I just cannot figure out SPEED Q.


Mei and Lin took part in a cycling race. Mei cycled at a speed of 20km/h. Both of them did not change their speed throughout the race. When Lin reached 1/2 the distance, Mei was 3.5km in front of her. Mei reached the finishing line at 10.45am. What time did Lin reach the finishing line?

HI

Draw a simple diagram to show the relationships between cyclists.

When Lin completed half the race, Mei was 3.5 km ahead of here.

When Lin completed the race, Mei would be 7km (2*3.5) over the finishing line if she didn’t stop.

7/20*60 ------ 21 min

21 min from 10.45am ------- 11.06am

Best wishes

[tianzhu]

Hi kavisuresh


CHS Q11

Please refer to this link.
http://www.onsponge.com/forum/35-thinkingmathonsponge/5319-prelim-2-2010-cat-high-model-drawing.html

CHS Q14

http://www.kiasuparents.com/kiasu/forum/viewtopic.php?f=69&t=280&hilit=0648+5h&start=3160

Best wishes

[tianzhu]

pensiveowl:

Thanks Tianzhu!

Hi

You're welcome.

Best wishes

[tianzhu]

TT2:

Got it. Thank you, tianzhu

Hi

You're welcome.

Best wishes

[smileplease]

tianzhu


thank you for your help on the 2 Qs.

[tianzhu]

smileplease:

tianzhu


thank you for your help on the 2 Qs.

Hi

You're welcome.

Best wishes

[tianzhu]

Hi


CHS P6 SA2 Q5

Total playing time ------ 5*40 ------ 200

200/8 ------ 25

Average time per pupil ----- 25

CHS P6 SA2 Q7

Divide the rectangle into 4 parts vertically.
Divide the rectangle into 2 parts horizontally.

Altogether, there are 8 small rectangles or units.

5 units ------90
1 unit ----- 18

Area of XBC ----- 3 units ------ 54.

CHS P6 SA2 Q10

Jane ------ 8*4 or 32 toys in 4 days.

32 + 18 ----- 50
13 - 8 ----- 5

50/5 ------ 10

Mary ------10 days

Best wishes

[tianzhu]

Hi kavisuresh


MGS Q15 SA2 2010

G:R ------- 125:100
B: (G+R) ------ 180:225 ----- 80% of (G+R)

G:R:B ------ 125180 ------ 25:20:36

36 – 25 ------ 11

11 units ------ 11

1 unit ------ 1

G --------25
R --------20
G+R -------45

For Q16, please refer to the solution in the WS and give it a try again.

Best wishes