Q&A - PSLE Math

[questionable_i]

Can anyone help me with these question? Thank you

Q1) Luqman's and Bryan's salary are in the ratio 8:9 respectively. If Luqman's salary increased by 50%, by what percentage must Bryan's salary be increased so that both their salaries will be the same?

Q2) In a competition between teams A, B and C, the number of points scored by Team A and Team B was 75. Team B's score was 50% of Team C's score. Team C's score was 4 times as many as Team A's score. Find the total number of points scored by the 3 teams.

[SOS mum]

Hi，ps help. Many tks and God Bless:)

There is a total of 1036 goats and ducks in a farm. 2/9 of the number of goats is equal to 3/5 of the number of ducks.

(a) How many goats are there on the farm?

(b) 1/6 of the goats are sold. Express the number of goats remaining in the farm as a fraction of the number of ducks in the farm. Express the fraction in its simplest form.

[questionable_i]

Hi，ps help. Many tks and God Bless:)

There is a total of 1036 goats and ducks in a farm. 2/9 of the number of goats is equal to 3/5 of the number of ducks.

(a) How many goats are there on the farm?

(b) 1/6 of the goats are sold. Express the number of goats remaining in the farm as a fraction of the number of ducks in the farm. Express the fraction in its simplest form.

SOS mum, actually, u can use "Equal Fraction" to solve this question.

http://i64.tinypic.com/14v68le.jpg

[BigDevil]

Can anyone help me with these question? Thank you

Q1) Luqman's and Bryan's salary are in the ratio 8:9 respectively. If Luqman's salary increased by 50%, by what percentage must Bryan's salary be increased so that both their salaries will be the same?

L -> 8u
B -> 9u

After L increased by 50% (4u), L -> 12u
B needs to increase by 12u - 9u = 3u

% increase -> 3u / 9u x 100 = 33.33%

[BigDevil]

Q2) In a competition between teams A, B and C, the number of points scored by Team A and Team B was 75. Team B's score was 50% of Team C's score. Team C's score was 4 times as many as Team A's score. Find the total number of points scored by the 3 teams.

A -> 1u
B -> 2u (50% of C)
C -> 4u (4 times of A)
Total -> 7u

A + B -> 3u = 75
1u = 25

7u -> ?

[ninjamathtv]

Need some guide on the following questions.
Thanks

This is my video solution to this question. Hope it helps.

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[Steadyberry]

pls help. thank you very much.

a motorcycle travelled 75km in 45 mins and later increased its speed by 20% for the next 150km. what was the average speed of the motorcycle for the whole journey?

[EconsPhDTutor]

pls help. thank you very much.

a motorcycle travelled 75km in 45 mins and later increased its speed by 20% for the next 150km. what was the average speed of the motorcycle for the whole journey?

During the first 45 mins, its average speed was 100 km/h.

We are told that for the remaining 150 km, its average speed was 120 km/h. And so it would have taken 1 hr 15 min to travel that 150 km.

Altogether, it took 2 hours to travel 225 km. And so the average speed for the whole journey was 112.5 km/h.

Hope this helps and feel free to ask for any clarifications.

- Dr. Choo Yan Min

www.EconsPhDTutor.com

If you found this answer helpful, then please help me out by spreading word of my services. I’m a new tutor in Singapore so I need some help getting word out! Thank you!

[ninjamathtv]

Hi, ps help. Many thks and God Bless:)

2) In a bakery shop, there are some curry, sardine and kaya buns. There are 216 more curry than sardine buns. There is 3 times as many curry as kaya buns. There is 12% as many sardine buns as the total number of buns. How many buns are there in the bakery shop?

My solution in video. Hope you can understand.

[/youtube]

[questionable_i]

Hi! Can anyone help me with this question and please explain step by step. Thank you so much.

Q1) Mrs Tan bought some cups and pots in a shopping trip. The price of each cup was $3.20 while the price of each pot was $12.40. For every 4 pots bought, she was given one such cup for free. After receiving the free cups, the number of cups was 1/3 of the number of pots bought. If Mrs Tan paid a total of $2280,

(a) how much pots did she buy?
(b) how much more did she pay for the pots than the cups?