Q&A - PSLE Math

[Hifive]

Hi MDAJP


Thanks for providing an alternative method of solution.

Regards

[MathIzzzFun]

bobsg01:

:stupid:


P6 Math problem again.

Thanks in advance for the help provided.

http://i55.tinypic.com/jqnf60.jpg\">

Hi bobsg01,

Difference between the two shaded parts = difference in area between 1/4 circle of 4cm and semi circle of 3cm.

cheers.

[MDAJP]

HoSayLiao:

Can someone help with this question?


Ali has $300. He lost 1/3 of it and ends up with $200. To have the $300 again, he needs to win $100 which is ½ of the $200. 1/3 is known as the Losing Fraction (LF) and ½ is known as the Winning Fraction (WF). ½ times 1/3 = 1/6. 1/6 is the product of the LF and WF, known as the PLW. Find the LF and the WF if the PLW is 81/400.

Hi HoSayLiao, in my diagram below, the shaded parts represent the amount lost. Hope my solution makes sense.

http://i52.tinypic.com/xeg6u0.jpg\">

[bobsg01]

Thank you MDAJP and MathIzzzFun.

[bobsg01]

Confusing P6 math question again.


An advance :thankyou:

http://i51.tinypic.com/b3lqnn.jpg\">

[ridcully]

Hi

Could a kind soul explain how to solve this problem:

Mdm Kavi bought a few kilograms of curry powder. She packed the curry powder into equal packets of 1/4 kg each. If she had packed the curry powder into packets of 1/10 kg each, she would get 18 more packets of curry powder. Find the amount of curry powder that she bought.

Thanks.

[carebear]

bobsg01:

Confusing P6 math question again.


An advance :thankyou:

http://i51.tinypic.com/b3lqnn.jpg\">

In July,
No. of tulips sold = 30% x 1350 = 405
No. of roses sold = 405
No. of carnations sold = 1350-405-405= 540

In August,
Increase in no. of carnations sold = 45% x 540 = 243
No. of carnations sold = 540+243 = 783
783 carnations represent 27% of total no. of flowers sold.
73% total flowers sold are tulips and roses.
No. Of tulips and roses sold = 73/27 x 783= 2117

Let F be the % increase in tulips and roses sold from July to August
(45% x 540) + 540 = 783
(F% x 810) + 810 = 2117

F = 161.35%

[carebear]

ridcully:

Hi

Could a kind soul explain how to solve this problem:

Mdm Kavi bought a few kilograms of curry powder. She packed the curry powder into equal packets of 1/4 kg each. If she had packed the curry powder into packets of 1/10 kg each, she would get 18 more packets of curry powder. Find the amount of curry powder that she bought.

Thanks.

Let x kg be the weight of curry powder.

If packed in 1/4 kg packet, no. of packets = 4x
If packed in 1/10 kg packet, no. of packets = 10x

If packed in 1/10 kg packet , no. of packets will be 18 more,

so

4x + 18 = 10x

x = 3kg

Weight of curry powder = 3kg

[ridcully]

Thanks,carebear. That's an elegant solution.

:celebrate:

[bobsg01]

Thank you carebear.


:rahrah: :rahrah: