Tutor MathsGuru: Ask me for your burning Maths questions!

[YLH88]

Hi mathsguru,


Need your help to solve the below 3 questions from P6 :?: . I know the last question has been solved in the forum, but I still don't quite understand.

1) If Kenny gives 18 marbles to Andrew, he will have thrice as many marbles as Andrew. If Andrew gives 12 marbles to Kenny, he will have 1/9 of the number of marbles that Kenny has. How many marbles does Kenny have at first ?

2) Mei and Lin took part in a cycling race. Mei cycled at a speed of 20 km/h. Both of them did not change their speed throughout the race. When Lin covered 1/2 the distance, Mei was 3.5 km in front of her. Mei reached the finishing line at 10.45 am. What time did Lin reach the finishing line ?

3) Jim bought some chocolates and gave half of them to Ken. Ken bought some sweets and gave half of them to Jim. Jim ate 12 sweets and Ken ate 18 chocolates. After that, the number of sweets and chocolates Jim had were in the ratio 1:7 and the number of sweets and chocolates Ken had were in the ratio 1:4. How many sweets did Ken buy ?


Thank you so much for your help !!

[sachiko]

Hi


I would appreciate if you could help me to solve the following questions:

1) Marcus, Joanna and Shawn had 48 stamps. Marcus had 10 more stamps than Joanna and 14 more stamps than Shawn. When Marcus gave some stamps to Joanna and Shawn, all of them had an equal number of stamps. How many stamps did Joanna and Shawn receive from Marcus?

2) Osman had $41 and Mike had $15. After each boy had bought the same textbook each at the bookshop, Osman had 5 times as much money as Mike. How much did the texbook cost?

Thank you

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.

[lizawa]

Hi Sachiko,


Not maths guru, but here's solution to q1:
http://farm5.static.flickr.com/4043/4246115761_f027f660bd.jpg\">

[lizawa]

Hi Sachiko, solution to question 2:

http://farm3.static.flickr.com/2718/4246924078_13bd639b35.jpg\">

[pineapple tarts]

Hi,


Sorry, my 1st post is to ask question instead of contributing. I will try to do so whenever i can OK. I am stuck with this P2 maths question for now.

Alicia is 12kg lighter than Andrew. The mass of Sanji is half the weight of Andrew. If the total mass of the 3 children is 78 kgs, find the weight of Alicia’s mass. The answer is 24kg. But I cannot understand how to solve it. Pls help me. Many thanks!

[Dharma]

pineapple tarts:

Hi,


Sorry, my 1st post is to ask question instead of contributing. I will try to do so whenever i can OK. I am stuck with this P2 maths question for now.

Alicia is 12kg lighter than Andrew. The mass of Sanji is half the weight of Andrew. If the total mass of the 3 children is 78 kgs, find the weight of Alicia's mass. The answer is 24kg. But I cannot understand how to solve it. Pls help me. Many thanks!

Sanji : 1 unit
Andrew : 2 units
Alicia : 2 units – 12
5units – 12 = 78
5 units = 90
1 unit = 18
Alicia = (2 x 18 ) – 12 = 36 – 12 = 24
Alicia's mass is 24kg

[pineapple tarts]

Dharma:

pineapple tarts:

Hi,


Sorry, my 1st post is to ask question instead of contributing. I will try to do so whenever i can OK. I am stuck with this P2 maths question for now.

Alicia is 12kg lighter than Andrew. The mass of Sanji is half the weight of Andrew. If the total mass of the 3 children is 78 kgs, find the weight of Alicia's mass. The answer is 24kg. But I cannot understand how to solve it. Pls help me. Many thanks!

Sanji : 1 unit
Andrew : 2 units
Alicia : 2 units – 12
5units – 12 = 78
5 units = 90
1 unit = 18
Alicia = (2 x 18 ) – 12 = 36 – 12 = 24
Alicia's mass is 24kg

Wow!! I am impressed :salute: . It's so clear. Thank you very much !!

[sachiko]

Thank you for your help.

lizawa:

Hi Sachiko,

Not maths guru, but here's solution to q1:
http://farm5.static.flickr.com/4043/4246115761_f027f660bd.jpg\">

[Dharma]

YLH88:

Hi mathsguru,


Need your help to solve the below 3 questions from P6 :?: . I know the last question has been solved in the forum, but I still don't quite understand.

1) If Kenny gives 18 marbles to Andrew, he will have thrice as many marbles as Andrew. If Andrew gives 12 marbles to Kenny, he will have 1/9 of the number of marbles that Kenny has. How many marbles does Kenny have at first ?

2) Mei and Lin took part in a cycling race. Mei cycled at a speed of 20 km/h. Both of them did not change their speed throughout the race. When Lin covered 1/2 the distance, Mei was 3.5 km in front of her. Mei reached the finishing line at 10.45 am. What time did Lin reach the finishing line ?

3) Jim bought some chocolates and gave half of them to Ken. Ken bought some sweets and gave half of them to Jim. Jim ate 12 sweets and Ken ate 18 chocolates. After that, the number of sweets and chocolates Jim had were in the ratio 1:7 and the number of sweets and chocolates Ken had were in the ratio 1:4. How many sweets did Ken buy ?


Thank you so much for your help !!

Hope this helps.

http://www.postimage.org/image.php?v=Ts1OQBLJ


http://www.postimage.org/image.php?v=aVWoT09


http://www.postimage.org/image.php?v=Pq19K8fA

[tianzhu]

Hi


Hope this helps.

http://farm5.static.flickr.com/4055/4246546311_6754ffbb02_o.jpg\">