Tutor MathsGuru: Ask me for your burning Maths questions!

[mathsguru]

Daddy:

Dear maths guru,


Need help!!

Area of triangle problem.
1) The area of the triangle is 1/16 of the area of the rectangle. If the total area of the rectangle and triangle is 252 cm2. Find the perimeter of the rectangle.

http://i222.photobucket.com/albums/dd39/tham33/area.jpg\">

Thanks

Hi Daddy,

Here's my solution.

Cheers,
MathsGuru

http://www.postimage.org/image.php?v=aV72ETi

[mathsguru]

firebird:

Dear Mathsguru


Please help me on the following:

At 8am a bus starts to travel from Jorhor Bahru to Kuala Lumpur. 2 hours later, a car starts from Johor Bahru and travels along the same route. The car over takes the bus at 1pm. If the speed of the car is 30km/h faster than the bus, find
a) the speed of the bus
b) the speed of the car

Many thanks
firebird

Hi Firebird,

Here's my solution.

Cheers,
MathsGuru

http://www.postimage.org/image.php?v=gxKZjY9

[mathsguru]

KoalaMummy:

i need an urgent answer to this question, by tonight.. hope you don't mind...

A book cost $12 more than a magazine. 2 magazine and 5 books cost $110. Find the cost of a book and a magazine.

Hi KoalaMummy,

Here's my solution. I do agree though that the figures used in the question give \"not so round\" numbers for answers.

Cheers,
MathsGuru

http://www.postimage.org/image.php?v=PqiAC5J

[mathsguru]

Cheerfuldad:

Q 1. Twice a number is greater than 3/5 of the number by 21. What is 2/3 of the number?


Q2. Aifangpi ans Sashimi had an equal amount of money. Each day, Aifangpi spent $60 and Sashimi spent $32. When Aifangpi has spent all her money. Sashimi still had $336 left. How much money had Aifangpi at first?

TIA

Hi Cheerfuldad,

Here're my solutions.

Cheers,
MathsGuru

http://www.postimage.org/image.php?v=aV72Wli

http://www.postimage.org/image.php?v=aV72YQr

[mathsguru]

free willy:

I don't know how to help my P6 boy with this homework question. He miss the class cause he had to go for tournment.


Box A has 200 red balls and 90 blue balls. Box B has 80 red balls and 100 blue balls. How many red balls and blue balls need to be moved from box A to Box B so that there are 80%of red balls in box A and 50% of blue balls in box B.

Hi Free Willy,

Here's my solution.

Cheers,
MathsGuru

http://www.postimage.org/image.php?v=aV737P0

[mathsguru]

shemum:

Hi Maths Guru,


Please help me to solve the below question.

An MRT train was 2/5 full of passengers. At the first station, 1/2 of the passengers alighted and 17 people boarded the train. The train is now 1/4 full. How many passengers were there on the train at first?

Thank you.

Shemum

Hi Shemum,

Here's my solution.

Cheers,
MathsGuru

http://www.postimage.org/image.php?v=TsGHpGA

[mathsguru]

Jolyn:

Hi Maths Guru


I have 2 questions as follows which need your help:

1. There were 84 more books on the self than in the box. Grace transferred 30 books from the box onto the shelf. How many more books are there on the shelf than in the box now?

2. At a sale, 1982 towels were sold. Out of these towels, 514 of them were face towels, 312 were hand towels and the rest were bath towels. how many more bath towels than face towels were sold?

Thank you very much.

Hi Jolyn,

Here're my solutions.

Cheers,
MathsGuru

http://www.postimage.org/image.php?v=gxK_6R0

http://www.postimage.org/image.php?v=gxK_bQi

[mathsguru]

Vanilla Cake:

Hi Mathsguru,

Pls help to solve this problem sum using models and TIA

Gabriel had some guppies. He gave 1/4 of it to Jenni.
Jenni had some mollies. She gave 2/5 of it to Gabriel.
Later 30 of Gabriel's mollies died. As a result the ratio of Gabriel's guppies to his mollies became 3 : 1. Jenni bought another 80 mollies. After that the ratio of Jenni's guppies to her mollies became 1 : 4 as a result.
How many of mollies had Jenni at first?

Hi Vanilla Cake,

Here's my solution.

Cheers,
MathsGuru

http://www.postimage.org/image.php?v=TsGHuFS

[mathsguru]

Vanilla Cake:

Hi Maths Monster/adhdadhd,

Thanks for your fast response. :salute:

Another :?: problem sum that needs model solution.

A has 200 more books than B. A gives 60% of her books to B. B then gives 25% of her books back to A. In the end, B has 200 more books than A. How many books does A have at first?

Plus this one from http://www.orlesson.org/orp/09Ma/2009-Math-SA1-TaoNan.pdf.

Leela and Kumar shared a sum of money. Leela's share was $90 less than Kumar's. After Kumar gave 1/7 of his share to Leela, Leela had $10 more than Kumar.

(a) How much did Leela have at first?
(b) What was the sum of money?

Cannot understand the given solution in the link, :stupid: Pls help with model solution.
TIA for all your help.

Hi Vanilla Cake,

Here're my solutions.

Cheers,
MathsGuru

http://www.postimage.org/image.php?v=gxK_oj0

http://www.postimage.org/image.php?v=gxK_qO9

[mathsguru]

wkong:

Dear MathsGuru,


Can you pls help for the following question and provide me the method?


A container 5/6 full of sand has a mass of 108kg. The same container ¼ full of sugar has a mass of 30kg. The container when full of sand is 60kg heavier than when it is full of sugar. Find the mass of the empty container.

Thanks.

Hi Wkong,

Here's my solution. The aim here is to try to eliminate one type of item.

Cheers,
MathsGuru

http://www.postimage.org/image.php?v=aV77zb0