Q&A - PSLE Math

[questionable_i]

Can anyone help me with these questions?

1. Mrs Lim will make a profit which is 19% of the import price if she sells the necklace at $4165. What will be her profit if she sells the necklace at $4270 and the import price of the necklace remains constant?

2. Students are donating money to a charity fund that helps less privileged kids. The number of $2, $5 and $10-notes donated are in the ratio of 9 : 2 : 5.
4/9 of the $2-notes and 10 $5-notes are taken out. The remaining notes are worth $300. How many $10-notes are there?

[Ice watch]

Can anyone help me with these questions?

1. Mrs Lim will make a profit which is 19% of the import price if she sells the necklace at $4165. What will be her profit if she sells the necklace at $4270 and the import price of the necklace remains constant?

2. Students are donating money to a charity fund that helps less privileged kids. The number of $2, $5 and $10-notes donated are in the ratio of 9 : 2 : 5.
4/9 of the $2-notes and 10 $5-notes are taken out. The remaining notes are worth $300. How many $10-notes are there?

[forestcadee]

Hi, can someone help to solve the following 2 questions on circles? Thank you.

[Ice watch]

Hi, can someone help to solve the following 2 questions on circles? Thank you.

(1/2)*(3.14*12*12) = 226.08 cm^2 ==> 226cm^2

[Ice watch]

Hi, can someone help to solve the following 2 questions on circles? Thank you.

(1/3)*(3.14*10*10) = 104.67 cm^2 ==> 105cm^2

[forestcadee]

Thanks, Ice watch and your detailed drawings.

[angel]

1190 people watched a movie. 2/5 of the male audience and 1/7 of the female audience were children. There were an equal number of men and women. How many audience were women?


(I always get stuck with questions like these. I worked on same denominator, then I'm stuck as I am confused its total 35 units or 70. )

[Ender]

Let total male be 5M and female be 7F

Since there's equal number of Men and Women, therefore 3M = 6F
Hence we can make them common unit. Men is 3 parts, Womem is 6 parts. LCM would be 6

We let Men be 6u, and women be 6u.

Finding total male
3/5 => 6u
5/5 => 10u

Finding total female
6/7 => 6u
7/7 => 7u

Total audience = 17u = 1190
u= 70

Women = 6u = 6(70) = 420

[Nebbermind]

1190 people watched a movie. 2/5 of the male audience and 1/7 of the female audience were children. There were an equal number of men and women. How many audience were women?


(I always get stuck with questions like these. I worked on same denominator, then I'm stuck as I am confused its total 35 units or 70. )

Male: 2U children, 3U men
Female: 1P children. 6P women

Since 3U = 6P -> U = 2P,

Total = 10P + 7P = 1190
Find 6P

[questionable_i]

Can anyone help me with these questions?

1. Mrs Lim will make a profit which is 19% of the import price if she sells the necklace at $4165. What will be her profit if she sells the necklace at $4270 and the import price of the necklace remains constant?

2. Students are donating money to a charity fund that helps less privileged kids. The number of $2, $5 and $10-notes donated are in the ratio of 9 : 2 : 5.
4/9 of the $2-notes and 10 $5-notes are taken out. The remaining notes are worth $300. How many $10-notes are there?

Ice watch