Tutor MathsGuru: Ask me for your burning Maths questions!

[Tang]

mathsguru:

biscuitqueen:

Hi there, please help me solve this Maths questn for my daughter.

I have no idea how to solve. Thanx!

Mary and Ken travelled from Town A to Town B. Mary left Town A at 0915 and took 4h to reach Town B. Ken left Town A at 1000 and took 2h 45min to reach Town B. At what time did Ken pass Mary?

Hi Biscuitqueen,

Here's my solution. Hope it helps!

Cheers,
MathsGuru

http://www.postimage.org/image.php?v=gxbp40J

Hello,

I believe this is the 3rd time I am highlighting the same issue in this forum. For the benefit of those taking PSLE 2010, I will repeat it for the very last time. Please note that the below statement will be marked wrong.

10 am + 1 h 39 min = 11.39 am

You will easily lose 1 mark for mixing Time with Duration.

[clblinym]

tianzhu:

Hi

Hope this helps.
http://farm5.static.flickr.com/4129/4842986868_3803e18102_b.jpg\">

Best wishes

~~~~~~~~~~~~~~~~~~
Dear tianzhu,

Thank you so much for the detailed explanation. I really appreciate your help. It is very nice to have you guys here.

Thanks and regards,
Amy

[tianzhu]

Hi clblinym


You’re welcome.

Best wishes

[markfch]

mathsguru:

Hi Markfch,


You can guide your DS slowly to draw the model out for this diagram. My advice to my students is to let the person with smallest no. of items, weight, money, etc (in this case, age) be 1 unit. In algebraic terms, this will be \"x\".

Here's my solution for your reference.

Cheers,
MathsGuru

http://www.postimage.org/image.php?v=TsGg5IS

Thanks guru, will try later.

[Skydust]

mathsguru:

Skydust:

Hello Mathguru,


How do you solve this question?

A box of donuts is shared equally among Clara,Siti and Joy. Clara divided her share into 3 equal packets. Siti divided her share into 4 equal boxes.Joy divided her share into 6 equal boxes. The total number of donuts in 2 of Clara's boxes, 3 of Siti's boxes and 3 of Joy's boxes is 138. What is the total number of donuts in the box at first?

EDIT: I got the answer 216, is it correct?

Hi Skydust,

Yes, your answer is correct! I've done up a model diagram for your reference. The trick here is to use LCM to obtain a common no. of units for each of them.


MathsGuru

http://www.postimage.org/image.php?v=PqikHv9

Thanks so much !

[Ngserene617]

Hi pls help me with this question below:

\t
Ali spent  of his savings on a pen. He spent  of the remainder on a book. If he had $38 left, how much did he have at the beginning?

Thanks !

suiyuan:

mathsguru:

:
:idea: Post your questions here and see how MathsGuru solve them to the best of her ability. Detailed solutions will be posted back in this thread.

So start asking and watch this space!!

Cheers :celebrate: ,
MathsGuru

P/S (Disclaimer, in case you're wondering...):
Although MathsGuru is a full-time Maths tutor, this thread is meant to be an absolutely free resource for parents (or even children) with no strings attached. Just someone who's passionate about Maths and wanna spread the fun in learning Maths with others.

Hi
Thank you for your offer.

1)During a warehouse book sale, Sally spent 62.5% of her money on 24 books and 18 pens. She also spent 25% of her remaining money on 18 files. Each pen costs 8/9 as much as the price of one book. The file costs $7.80 less than a book. Find the total cost of one book and one pen.

2)Mr Lim spent $1496 on some comics and dictionaries altogether. The number of comics bought to the number of dictionaries bought was in the ratio of 3 : 2. A dictionary cost $4 more than a comic. The total cost of the comics was 20% more than the total cost of the dictionaries. Find the cost of a dictionary.

[Ngserene617]

Hi pls help me with this question below:


Ali spent  of his savings on a pen. He spent  of the remainder on a book. If he had $38 left, how much did he have at the beginning?

Thanks !

mathsguru:

Original Title: Let MathsGuru Answer Your Burning Maths Questions!

:welcome:

Dear Parents,

Are you frustrated/stuck when helping your child solve his/her Maths questions? Are you inclined to use Algebra most of the time? Do you have difficulty trying to use diagrams or other heuristic methods (that Primary School students learn) to solve?

:idea: Post your questions here and see how MathsGuru solve them to the best of her ability. Detailed solutions will be posted back in this thread.

So start asking and watch this space!!

Cheers :celebrate: ,
MathsGuru

P/S (Disclaimer, in case you're wondering...):
Although MathsGuru is a full-time Maths tutor, this thread is meant to be an absolutely free resource for parents (or even children) with no strings attached. Just someone who's passionate about Maths and wanna spread the fun in learning Maths with others.

[Ngserene617]

Hi need help for this question:


The distance between Town A and Town B is 12 km 400 m and between Town A and Town C is 26 km. Tom travelled from Town A to Town B and then returned to Town A before going to Town C. What was the total distance Tom travelled?

Thanks!

mathsguru:

Original Title: Let MathsGuru Answer Your Burning Maths Questions!

:welcome:

Dear Parents,

Are you frustrated/stuck when helping your child solve his/her Maths questions? Are you inclined to use Algebra most of the time? Do you have difficulty trying to use diagrams or other heuristic methods (that Primary School students learn) to solve?

:idea: Post your questions here and see how MathsGuru solve them to the best of her ability. Detailed solutions will be posted back in this thread.

So start asking and watch this space!!

Cheers :celebrate: ,
MathsGuru

P/S (Disclaimer, in case you're wondering...):
Although MathsGuru is a full-time Maths tutor, this thread is meant to be an absolutely free resource for parents (or even children) with no strings attached. Just someone who's passionate about Maths and wanna spread the fun in learning Maths with others.

[Ngserene617]

Hi mathsguru,


Kindly assist me with all these questions belows:

4.
 of Limin's money can buy 40 books. How many books can she buy with  of her money?
 

 

 

 

 

 

 

5.
Mary bought a leather bag with  of her money. She spent the remainder on 14 pairs of socks which costed $6 each pair. How much was the leather bag?
 

 

 

 

 

 

 
6.
Nigel has $145. He donated  to charity. Of the remainder, he gave to his sister. How much did he give to his sister?
 

 

 

 

 

 

 

7.
There are 567 students in a school.  are boys and the rest are girls. There are 9 times as many girls as there are teachers. How many teachers are there?

Thanks alot!

mathsguru:

Original Title: Let MathsGuru Answer Your Burning Maths Questions!

:welcome:

Dear Parents,

Are you frustrated/stuck when helping your child solve his/her Maths questions? Are you inclined to use Algebra most of the time? Do you have difficulty trying to use diagrams or other heuristic methods (that Primary School students learn) to solve?

:idea: Post your questions here and see how MathsGuru solve them to the best of her ability. Detailed solutions will be posted back in this thread.

So start asking and watch this space!!

Cheers :celebrate: ,
MathsGuru

P/S (Disclaimer, in case you're wondering...):
Although MathsGuru is a full-time Maths tutor, this thread is meant to be an absolutely free resource for parents (or even children) with no strings attached. Just someone who's passionate about Maths and wanna spread the fun in learning Maths with others.

[Ngserene617]

Pls assist me with the below question: 


A train travels from Singapore to Kuala Lumpur, passing Malacca. The train travels 85 km in each hour. From Singapore to Malacca it takes 2 hours and from Malacca to Kuala Lumpur it takes 3 hours. What is the distance between Singapore and Kuala Lumpur?


Thanks!