Tutor MathsGuru: Ask me for your burning Maths questions!

[MathIzzzFun]

elishatan:

Two questions!


#1. Is the answer 57kg?
http://i49.tinypic.com/27yys1.jpg\">

#2.
Aisha took 30mins to walk from Village A towards Village B at a uniform speed. Baoli took 45mins to walk from Village B towards Village A at a uniform speed. Both of them started at 2.20pm.
a. At what time did Aisha and Baoli pass each other along the way?
b. At the same time that Aisha reached Village B, Carol started to walk from Village A towards Village B at the same uniform speed as Aisha. At what time did Baoli and Carol meet?

Thank you!

average mass of the 4 adults is 57 kg.... but question is not properly set - by adding the given subtotals, there should be 3 sets of 228 kg.

http://www.flickr.com/photos/mathizzzfun/8592068562/in/photostream

cheers.

[Always21]

Pls help!!

The area of a rectangle is 36cm square. If its breath is 1/4 it’s length, find its perimeter.

Math guru, Pls help!! This is a pri4 question.

[Maths Hub]

Always21:

Pls help!!

The area of a rectangle is 36cm square. If its breath is 1/4 it's length, find its perimeter.

Math guru, Pls help!! This is a pri4 question.

In Primary 4, children learn about factors and multiples.

36 = 1 X 36
= 2 X 18
= 3 X 12
= 4 X 9
= 6 X 6

Only the 3 X 12 case have breath is 1/4 length. So the perimeter will be 3 + 12 + 3 + 12 = 30 cm.

Cheers.

[Always21]

Maths Hub:

Always21:

Pls help!!

The area of a rectangle is 36cm square. If its breath is 1/4 it's length, find its perimeter.

Math guru, Pls help!! This is a pri4 question.

In Primary 4, children learn about factors and multiples.

36 = 1 X 36
= 2 X 18
= 3 X 12
= 4 X 9
= 6 X 6

Only the 3 X 12 case have breath is 1/4 length. So the perimeter will be 3 + 12 + 3 + 12 = 30 cm.

Cheers.

Thank you very very much!!

[Always21]

Math guru, need you help


A gardener had 1/2 a bag of soil. He used 5/8 of it to fill up a pot. What fraction of the soil was left?

Thank you in advance.

[Always21]

Math guru, I have one more that my boy does not understand. Also a pri4 question.


A) A worker packed 5 268 tiles into 6 crates equally. How many tiles were there in each crate?
He got the answer 878.

B) later, his boss threw out some chipped tiles from the crates and told him to repack the rest equally into 10 smaller ones. How many tiles did the boss throw out if there were 525 tiles in each of the smaller crates?

Thank you very much

[lee tong fong]

Math guru, need you help for the following questions:


(1)The number of chickens in farm A and Farm B are in the ratio 9:1.
Farm A sold a certain number of chickens and Farm B sold 2/3 of its chickens.
As a result, both Farm A and Farm B each had 209 chickens left.

(a) How many chickens were sold by the 2 Farm in all?
(b) What percentage of farm A’s chickens wre sold



(2) Joey has some red and blue beads.
If she buys another 15 red beads, the percentage of the red beads she has become 30%.
If she gives away 20 blue beads, the percentage of the blue beads she has becomes 76%.
However many red beads and blue beads do Joey have?


(3) To make a fruit cake, Mrs Lim used 90% strawberry and 10% mango.
The cost of the mangoes was 1.5 times that of the strawberries.
She spent $6.30 in all for the strawberries and mangoes
How much more would it cost her if she uses 40% strawbeey and 60% mango?



(4) Shaun and Chin Hong cycled along the same route from Point A to Point B
Shuan Cycled at the average speed of 20km/h and he was 4.5km ahead of Chin Hong when Chin Hong reached the half-way mark.
If Shuan reached Point B at 11:20am, what time would Chin Hong reach Point B?



(5) Peanut butter sandwiches and egg sandwiches are put on 2 plates, X and Y, such that there are equal number of sandwiches on each plate.
The ratio of the number of peanut butter sanswiches on plates x to the number of the peanut butter sanswiches on plates Y is 5:4.
The ratio of the number of egg sanswiches on plates x to the number of the egg sanswiches on plates Y is 3:5.
Find the ratio of the number of peanut butter sandwices on plates Y to the number of egg sandwiches on plate X.



(6) A total of 84 girls and 231 boys wre involved in a CIP programmeto clean up a section of the beach.
(a) Find the greatest number of groups that can be formed so that all the boys and girls are distributed equally among all the groups.
(b) What is the the total number of children in each group?

Thanks

[MathIzzzFun]

lee tong fong:

Math guru, need you help for the following questions:


(1)The number of chickens in farm A and Farm B are in the ratio 9:1.
Farm A sold a certain number of chickens and Farm B sold 2/3 of its chickens.
As a result, both Farm A and Farm B each had 209 chickens left.

(a) How many chickens were sold by the 2 Farm in all?
(b) What percentage of farm A's chickens wre sold



(2) Joey has some red and blue beads.
If she buys another 15 red beads, the percentage of the red beads she has become 30%.
If she gives away 20 blue beads, the percentage of the blue beads she has becomes 76%.
However many red beads and blue beads do Joey have?


(3) To make a fruit cake, Mrs Lim used 90% strawberry and 10% mango.
The cost of the mangoes was 1.5 times that of the strawberries.
She spent $6.30 in all for the strawberries and mangoes
How much more would it cost her if she uses 40% strawbeey and 60% mango?



(4) Shaun and Chin Hong cycled along the same route from Point A to Point B
Shuan Cycled at the average speed of 20km/h and he was 4.5km ahead of Chin Hong when Chin Hong reached the half-way mark.
If Shuan reached Point B at 11:20am, what time would Chin Hong reach Point B?



(5) Peanut butter sandwiches and egg sandwiches are put on 2 plates, X and Y, such that there are equal number of sandwiches on each plate.
The ratio of the number of peanut butter sanswiches on plates x to the number of the peanut butter sanswiches on plates Y is 5:4.
The ratio of the number of egg sanswiches on plates x to the number of the egg sanswiches on plates Y is 3:5.
Find the ratio of the number of peanut butter sandwices on plates Y to the number of egg sandwiches on plate X.



(6) A total of 84 girls and 231 boys wre involved in a CIP programmeto clean up a section of the beach.
(a) Find the greatest number of groups that can be formed so that all the boys and girls are distributed equally among all the groups.
(b) What is the the total number of children in each group?

Thanks

I believe you have posted the questions at the Q&A PSLE thread and the solutions are posted on pg 909-910
- http://www.kiasuparents.com/kiasu/forum/viewtopic.php?f=69&t=280

cheers.

[lee tong fong]

Mathizzfun, can you help me for question 5 as there is no response yet. As for question 3, can you help me confirm the correct answer is $5.40 or $1.50 or $17.50.Your solution should be correct, I believe. I do not have the answer as the questions are from school and to be hand out on Monday.

Thanks

[MathIzzzFun]

lee tong fong:

Mathizzfun, can you help me for question 5 as there is no response yet. As for question 3, can you help me confirm the correct answer is $5.40 or $1.50 or $17.50.Your solution should be correct, I believe. I do not have the answer as the questions are from school and to be hand out on Monday.

Thanks

(5) Peanut butter sandwiches and egg sandwiches are put on 2 plates, X and Y, such that there are equal number of sandwiches on each plate.
The ratio of the number of peanut butter sanswiches on plates x to the number of the peanut butter sanswiches on plates Y is 5:4.
The ratio of the number of egg sanswiches on plates x to the number of the egg sanswiches on plates Y is 3:5.
Find the ratio of the number of peanut butter sandwices on plates Y to the number of egg sandwiches on plate X.

http://i41.tinypic.com/34jch06.png\">

(3) To make a fruit cake, Mrs Lim used 90% strawberry and 10% mango.
The cost of the mangoes was 1.5 times that of the strawberries.
She spent $6.30 in all for the strawberries and mangoes
How much more would it cost her if she uses 40% strawbeey and 60% mango?

Here's another approach for this question:

Fruit cake --> 10 units --> 9 units of strawberries + 1 unit of mangoes

cost of 1 unit of mangoes
= 1.5 x cost of 9 units of strawberries
= cost of 13.5 units of strawberries

total cost of fruit cake with 90% strawberries & 10% mangoes
--> cost of 9 units of strawberries + cost of 13.5 units of strawberries
= cost of 22.5 units of strawberries --> $6.30
cost of 1 unit of strawberries --> $0.28

To make the fruit cake with 4 units of strawberries and 6 units of mangoes,
total cost
= 4 x $0.28 + 6 x 13.5 x $0.28
= $ 23.80

additional cost --> $23.80 - $6.30 = $17.50

cheers.