Q&A - PSLE Math

[alrama]

Kailing and jim had a total of $63. Kailing gave 0.3 of her share to jim. Jim then gave 1/3 of the total amount of money he had to his brother. In the end, all the three children had the same amount of money. How much money did kailing have at first? ans:36. Can anyone explain?

[MathIzzzFun]

Hifive:

Hi MathIzzzFun


Thanks for your explanation.

Have a nice day ahead!

u r welcome

cheers.

[bobsg01]

Need help to find Angle m


Thanks in advance for your help.

http://i55.tinypic.com/105z3lz.jpg\">

[atutor2001]

bobsg01:

Need help to find Angle m


Thanks in advance for your help.

http://i55.tinypic.com/105z3lz.jpg\">

I think the easiest way to solve is using \"rotation'.

Imagine that square SWXY and STUV are actually the same square.

Square STUV is the new position of SWXY when it is rotated 35 degree anti-clockwise.

Note :
line SY corresponds to line SV. After SY has rotated 35 degree anti-clockwise, it becomes SV
line SW corresponds to line ST. After SW has rotated 35 degree anti-clockwise, it becomes ST.

Therefore, angle WST = 35 degree


Then focus on square SPQR.

angle PST + angle WST + angle WSR = 90
30 + 35 + m = 90
m = 25

[bobsg01]

Thank you atutor2001 for the explaination and solution.

[MathIzzzFun]

alrama:

Kailing and jim had a total of $63. Kailing gave 0.3 of her share to jim. Jim then gave 1/3 of the total amount of money he had to his brother. In the end, all the three children had the same amount of money. How much money did kailing have at first? ans:36. Can anyone explain?

Hi

hope this helps

http://www.flickr.com/photos/62167097@N02/6020796670/in/photostream/

cheers.

[htn]

Need help

Nuryn and Liyana bought some clips and ribbons. Liyana bought 40% of the total number of clips and ribbons. Altogether, they bought 30 more ribbons than clips.
Nuryn bought 2/3 of the ribbons and 50% of the clips.
What was the total number of clips and ribbons that Liyana bought?


Btw does anyone have St Hillda 2010 preliminary paper , i need help for q 17,
Tia

[MathIzzzFun]

htn:

Need help

Nuryn and Liyana bought some clips and ribbons. Liyana bought 40% of the total number of clips and ribbons. Altogether, they bought 30 more ribbons than clips.
Nuryn bought 2/3 of the ribbons and 50% of the clips.
What was the total number of clips and ribbons that Liyana bought?


Btw does anyone have St Hillda 2010 preliminary paper , i need help for q 17,
Tia

Hi

Liyana = [50% Clips][1/3 ribbons] = 40% of total
Nuryn = [50% Clips][1/3 ribbons][1/3 ribbons] = 60% of total
So, [1/3 ribbons] = 20% of total = 30
100% = 5 x 30 = 150
40% = 2 x 30 = 60

Liyana bought a total of 60 ribbons and clips.

cheers.

[bobsg01]

Need help to find Angle a, b, d, e


Thanks in advance for your help.

http://i55.tinypic.com/oa645d.jpg\">

[pensiveowl]

Hi, could someone pls help us work this out:


http://www.positivelyquit.org/images/q17.jpg\">

Thanks