Q&A - PSLE Math

[Winx5015]

Hi, please help !


http://i49.tinypic.com/2jaj243.jpg\">

[Winx5015]

Hi, please help!


http://i45.tinypic.com/fa7x4i.jpg\">

[Winx5015]

Hi, please help !


http://i46.tinypic.com/r1m0k5.jpg\">

[charsen]

Winx5015:

Hi, please help !


http://i49.tinypic.com/2jaj243.jpg\">

Hi
190-73=117
117-56=61(ANS)
This question is solved by assumption.
Cheers

[zombie]

Thanks KoalaBear37, but can someone help me solve the rest ?

[Winx5015]

Hi charsen,


:thankyou:

[charsen]

Winx5015:

Hi, please help!


http://i45.tinypic.com/fa7x4i.jpg\">

Hi
This is my attempted answer.If any mistakes in the working, inconvenience
cause regretted.
6u-->54
1U--9
Alice paid-->9-7.45=$1.55
Actual money to be paid by each---->54/3=18
Ali money--->9x5=45
extra money paid by Ali --->45-18=27.
amount of money paid by meimei to ali---->18-7.45=$10.55(ANS)
amount of money paid by Alice to Ali--->18-1.55=$16.45(ANS)
cheers

[verykiasumummy]

hi charsen,


r u a tutor or teacher?

[trytry]

susutoo:

hi,

sorry forget to attached image
http://i45.tinypic.com/nqusdd.jpg\">

Sum of area of quadrant and area of semi circle=22/7x7x7x3/4=115.5
Area of rectangle card=91.5+115.5=207
Find factor of 207=9x23
G&C: Length of rectangle 23cm (21+2),Breadth=9cm (7+2)
Perimeter=23x2+9x2=64cm

[MathIzzzFun]

susutoo:

hi,

sorry forget to attached image
http://i45.tinypic.com/nqusdd.jpg\">

alternate approach :

fill in the unshaded with the area of quadrants and semi circle
--> 3/4 x 22/7 x7 x7 = 115.5 cm2

Total area of the rectangle = 115.5 + 91.5 = 207 cm2

The breadth and length of the card are whole numbers
--> 207 = 23 x 9

perimeter of rectangular card = (23+9) x 2 = 64 cm

cheers.