Need help with P6 Maths - Singapore Forums by SGClub.com
Singapore Forums by SGClub.com
Sitemap Contact Us FAQ Singapore Forums by SGClub.com
Home Photos Member List Register Mark Forums Read  
Go Back Home > Lifestyle > School Life > Math Help » Need help with P6 Maths

Why aren't you a member of SGClub.com yet??

» Join 130,000+ other members in chatting.
» Make lots of new friends here.
» Keep up-to-date with current events.
» Participate in Club outings.
» Download lots of Free Stuff!

Registration just takes 2mins and is absolutely free so join our community today!

I Want to Choose my Own Personal Nickname Now!


Reply
 
LinkBack Thread Tools Display Modes
Old 15th April 2012, 06:31 PM   #1 (permalink)
New SGClubber
DarrenTan is on a distinguished road

 
DarrenTan's Avatar
 
Posts: 3
Join Date: Apr 2012
Likes: 2
Liked 0 Times in 0 Posts
Gender:

Need help with P6 Maths

Q1:
There were some pens and pencils in a box. When Ali took out 24 pencils, there were 5 times as many pens as pencils left. If he had taken out 60% of the pens from the box instead, he would have twice as many pencils as pens left. How many pens were in the box at first?

Q2:
The ratio of Jamal's mass to Kathy's mass is 4:5. Jamal's mass is increased by 40% and Kathy's mass is decreased. What percentage of Kathy's mass must be decreased so that their total mass remain the same?

Thank You all in advance.

Sponsors:
DarrenTan is offline  
Add to DarrenTan's Reputation Reply With Quote
Old 15th April 2012, 07:01 PM   #2 (permalink)
Addicted SGClubber
Betakuwe has a spectacular aura about

 
Betakuwe's Avatar
 
Posts: 874
Join Date: Sep 2010
Likes: 6
Liked 48 Times in 41 Posts
Gender:

Re: Need help with P6 Maths

I reckon you're a parent helping your child. I've uploaded an attachment and have put the solution in spoiler. Look at the illustration and try to solve it with the aid of the picture before looking at the spoiler. Until you have reached a desperate state and still can't figure it out, then look at the spoiler. I ask of this cuz it would train you to solve p6 problems to help your child, rather than you relying on outside people.

Q1.

As you can see in the picture, 24 pencils(above) corresponds to 3 blocks(below). So each block corresponds to 24÷3=8 objects. There were 5 blocks of pens at first, so 8 x 5 = 40 pens were in the box at first.

Attached Images
File Type: png sgclub p6 q1.png (16.9 KB, 1 views)

Last edited by Betakuwe; 15th April 2012 at 07:03 PM.
Betakuwe is offline   Add to Betakuwe's Reputation Reply With Quote
Old 15th April 2012, 07:21 PM   #3 (permalink)
Addicted SGClubber
Betakuwe has a spectacular aura about

 
Betakuwe's Avatar
 
Posts: 874
Join Date: Sep 2010
Likes: 6
Liked 48 Times in 41 Posts
Gender:

Re: Need help with P6 Maths

Q2.
Initially, there are a total of 9 blocks.
After the change, if Kathy did not decrease in mass, then there will be a total of 4+(3/5)+5=9+(3/5) blocks.
So Kathy need to lose 3/5 blocks of mass for the sum of their mass to be the same.
To calculate percentage of Kathy's mass she need to lose,
((3/5) / 5) x 100%=(3/25) x 100% = 300/25 % = 12%


0987654321

Attached Images
File Type: png sgc p6 q2.png (14.2 KB, 0 views)

Last edited by Betakuwe; 15th April 2012 at 07:22 PM.
Betakuwe is offline   Add to Betakuwe's Reputation Reply With Quote
Old 15th April 2012, 07:42 PM   #4 (permalink)
New SGClubber
DarrenTan is on a distinguished road

 
DarrenTan's Avatar
 
Posts: 3
Join Date: Apr 2012
Likes: 2
Liked 0 Times in 0 Posts
Gender:

Re: Need help with P6 Maths

Hi Betakuwe, I know where you're coming from & I really appreciate your thoughts. I've fully understood your model drawing. Thank You so much.

DarrenTan is offline   Add to DarrenTan's Reputation Reply With Quote
Old 15th April 2012, 07:45 PM   #5 (permalink)
Addicted SGClubber
Betakuwe has a spectacular aura about

 
Betakuwe's Avatar
 
Posts: 874
Join Date: Sep 2010
Likes: 6
Liked 48 Times in 41 Posts
Gender:

Re: Need help with P6 Maths

Originally Posted by DarrenTan View Post
Hi Betakuwe, I know where you're coming from & I really appreciate your thoughts. I've fully understood your model drawing. Thank You so much.
Click the "I Like this" button or the "give rep" button so that I get closer to getting a pen

Betakuwe is offline   Add to Betakuwe's Reputation Reply With Quote
The Following 2 Users Say Thank You to Betakuwe For This Useful Post:
DarrenTan (15th April 2012), namelessname (16th April 2012)
Old 15th April 2012, 08:03 PM   #6 (permalink)
New SGClubber
DarrenTan is on a distinguished road

 
DarrenTan's Avatar
 
Posts: 3
Join Date: Apr 2012
Likes: 2
Liked 0 Times in 0 Posts
Gender:

Re: Need help with P6 Maths

Originally Posted by Betakuwe View Post
Q2.


0987654321
For Q2, after analising your model drawn, I've worked up the steps as follows...

After the changed,

Jamal---> 4/10 x 4U= 1U + 3/5
Jamal new mass is now--> 28U {(4x5) + 5 + 3)}
Kathy--> 45U-28U= 17U

Kathy initial mass is 5 x 5U= 25U
Kathy mass decreased by--> 25U-17U= 8U

8/25 x 100%= 32% (Ans)


Last edited by DarrenTan; 15th April 2012 at 08:04 PM.
DarrenTan is offline   Add to DarrenTan's Reputation Reply With Quote
Old 15th April 2012, 08:40 PM   #7 (permalink)
Addicted SGClubber
Betakuwe has a spectacular aura about

 
Betakuwe's Avatar
 
Posts: 874
Join Date: Sep 2010
Likes: 6
Liked 48 Times in 41 Posts
Gender:

Re: Need help with P6 Maths

Originally Posted by DarrenTan View Post
For Q2, after analising your model drawn, I've worked up the steps as follows...

After the changed,

Jamal---> 4/10 x 4U= 1U + 3/5
Jamal new mass is now--> 28U {(4x5) + 5 + 3)}
Kathy--> 45U-28U= 17U

Kathy initial mass is 5 x 5U= 25U
Kathy mass decreased by--> 25U-17U= 8U

8/25 x 100%= 32% (Ans)
Oops, I made a mistake, it should have been that their total mass is 10+(3/5) blocks after the change according to my solution.
So Kathy needed to lose 1+(3/5) blocks of mass, your answer is correct.

Betakuwe is offline   Add to Betakuwe's Reputation Reply With Quote
Members who Liked this post by Betakuwe:
DarrenTan (15th April 2012)
Reply

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
JC H2 Maths, O level A and E Maths, IP and IB Maths Tuition khotl73 Tuition Services & Educational Supplies 0 1st March 2012 01:40 PM
Creating a no nonsense H2 maths bridging portal (for those who did not take A maths in sec school) whitecorp School Life 4 14th December 2010 03:02 PM
Primary (Eng-Maths-Science) / Secondary (E-Maths/A-Maths/Sci/Chem) / JC Economics Tuition Available tuitiongenius Jobs & Services 0 5th December 2008 12:37 PM

» Sponsors
Watch Free Movies Online
Celebrity Gossip
Food Delivery

» Facebook Fans
» What's Going On?
Title, Username, & Date
[PMD-pedestrian rules] Singapore Court judges are high handed and biased or court rep
Ritter Sport chocolate recalled due to undeclared allergen
Aoki Hagane no Arpeggio: Ars Nova
I really hate my mother!!!
Mum's Kitchen Catering and Cherish Delights get licences suspended after nearly 40 people...
Transcend RDF9K2 All-in-One Card Reader
Transcend ESD250C, a portable SSD that’s super classy
Stupid court of appeal gives red light running driver who hit pedestrian 15% discount
How PAP exploited racial differences to impose FASCIST rule over Singapore.
Up to S$7250 of government $ misused for buying each vote in Singapore?
Funky Fields organic vegan spreadable recalled due to 'undisclosed allergen'
100 hawksbill turtles released into the sea after rare hatching on Sentosa
Inspirational Songs
Repost comment.
MOH, SFA investigating after 18 typhoid fever cases in 3 weeks
By militarily invading Hong Kong, Xi Jingping is setting in motion, the wheels of nuc
Deng XiaoPing original vision for HKG- China reunification was for the two to unite a
HSA warns against three products
Warning : Blacklist buyer/adopter Alert
512GB Transcend 830S M.2 SSD Review
Featured Photos
by marisoljames322
· · ·
Member Galleries
20359 photos
13619 comments
by marisoljames322
· · ·
Member Galleries
20359 photos
13619 comments
by pdsubbu
· · ·
Member Galleries
20359 photos
13619 comments
by Vikas Dhar
· · ·
Photography
35 photos
36 comments
by aaudreygan
· · ·
Guy Photos
1581 photos
946 comments
by aaudreygan
· · ·
Girl Photos
4351 photos
28606 comments
by a8paris
· · ·
Guy Photos
1581 photos
946 comments
by a8paris
· · ·
Guy Photos
1581 photos
946 comments
by aaricia
· · ·
Girl Photos
4351 photos
28606 comments
by aaricia
· · ·
Girl Photos
4351 photos
28606 comments

 

All times are GMT +8. The time now is 12:36 PM.


Powered by vBulletin
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright© 2004-2013 SGClub.com. All rights reserved.