Sec 4 Mathematics, Hire Purchase - 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 » Sec 4 Mathematics, Hire Purchase

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 11th February 2009, 03:08 PM   #1 (permalink)
Addicted SGClubber
pastelpink is on a distinguished road

 
Posts: 527
Join Date: Aug 2008
Likes: 1
Liked 0 Times in 0 Posts
Gender:

Sec 4 Mathematics, Hire Purchase

Qns: The cash price of an air-conditioner was S$1800. Vernon bought it by paying monthly instalments of S$129 w/ zero downpayment, If the flat rate of interest is 6% p.a., find the no. of instalments he has to make before gaining ownership of the air-conditioner.


this is how I did it:
6% x 1800 = S$108 + S$1800 = S$1908
S$129x12 = S$1548 which means he wont be able to finish paying for the air conditioner within the first year. hence, I add another year's interest.
S$1908 + S$108 = S$2016
S$2016-S$1548 = S$468
S$468 / 129 = 3.6 round off to nearest no. = 4
4+12=16 therefore, Vernon has to make 16 instalments before gaining ownership of the air conditioner.

but the answer sheet states that the answer for this question is 15. why is that so?

please help!

Sponsors:
pastelpink is offline  
Add to pastelpink's Reputation Reply With Quote
Old 11th February 2009, 03:40 PM   #2 (permalink)
Experienced SGClubber
Vikemen is on a distinguished road

 
Posts: 1,005
Join Date: Feb 2009
Likes: 0
Liked 0 Times in 0 Posts
Gender:

Re: Sec 4 Mathematics, Hire Purchase

yup it is 15
interest = 1800 x6/100 = 108
total pay = 108 + 1800 = 1908
no.installment = 1908 / 129 =14.791 = 15(round off)


Last edited by Vikemen; 11th February 2009 at 03:41 PM.
Vikemen is offline   Add to Vikemen's Reputation Reply With Quote
Old 11th February 2009, 03:44 PM   #3 (permalink)
Addicted SGClubber
pompomdidi is on a distinguished road

 
pompomdidi's Avatar
 
Posts: 545
Join Date: Jul 2008
Likes: 1
Liked 0 Times in 0 Posts
Gender:

Re: Sec 4 Mathematics, Hire Purchase

Tis is O'lv Math?

pompomdidi is offline   Add to pompomdidi's Reputation Reply With Quote
Old 11th February 2009, 03:45 PM   #4 (permalink)
Experienced SGClubber
Vikemen is on a distinguished road

 
Posts: 1,005
Join Date: Feb 2009
Likes: 0
Liked 0 Times in 0 Posts
Gender:

Re: Sec 4 Mathematics, Hire Purchase

seem like a easy Emath question

Vikemen is offline   Add to Vikemen's Reputation Reply With Quote
Old 11th February 2009, 03:57 PM   #5 (permalink)
Experienced SGClubber
skyangel is on a distinguished road

 
Posts: 1,400
Join Date: Aug 2008
Likes: 0
Liked 0 Times in 0 Posts
Gender:

Re: Sec 4 Mathematics, Hire Purchase

Originally Posted by Vikemen View Post
yup it is 15
interest = 1800 x6/100 = 108
total pay = 108 + 1800 = 1908
no.installment = 1908 / 129 =14.791 = 15(round off)
i got the same answer as you


Last edited by skyangel; 11th February 2009 at 03:57 PM.
skyangel is offline   Add to skyangel's Reputation Reply With Quote
Old 11th February 2009, 06:12 PM   #6 (permalink)
Addicted SGClubber
pastelpink is on a distinguished road

 
Posts: 527
Join Date: Aug 2008
Likes: 1
Liked 0 Times in 0 Posts
Gender:

Re: Sec 4 Mathematics, Hire Purchase

Originally Posted by skyangel View Post
i got the same answer as you
but, S$129x12 = S$1548, which means that Vernon would not have been able to finish paying the full sum by the end of the 1st year, so shouldn't you add another year's interest?

S$1908 + S$108 = $2016
S$2016/129 = 15.6 = 16 when rounded off

pastelpink is offline   Add to pastelpink's Reputation Reply With Quote
Old 11th February 2009, 06:16 PM   #7 (permalink)
Experienced SGClubber
Vikemen is on a distinguished road

 
Posts: 1,005
Join Date: Feb 2009
Likes: 0
Liked 0 Times in 0 Posts
Gender:

Re: Sec 4 Mathematics, Hire Purchase

hire purchase price is different , it is not about years ,it is about the total cost interest

Vikemen is offline   Add to Vikemen's Reputation Reply With Quote
Old 11th February 2009, 07:07 PM   #8 (permalink)
Addicted SGClubber
pastelpink is on a distinguished road

 
Posts: 527
Join Date: Aug 2008
Likes: 1
Liked 0 Times in 0 Posts
Gender:

Re: Sec 4 Mathematics, Hire Purchase

Originally Posted by Vikemen View Post
hire purchase price is different , it is not about years ,it is about the total cost interest
yeah, the total cost of interest in this case is S$108 x2, S$216 'cos Vernon took 2 years to repay the loan.
correct?
if not, please do explain why. im super confused

btw, thanks uh vikemen, for bothering enough to reply. (:

pastelpink added 1 Minutes and 17 Seconds later...

Originally Posted by pompomdidi View Post
Tis is O'lv Math?
haha, yeah.
e maths = elementary maths ma.


Last edited by pastelpink; 11th February 2009 at 07:08 PM. Reason: Post Bumping
pastelpink is offline   Add to pastelpink's Reputation Reply With Quote
Old 11th February 2009, 07:11 PM   #9 (permalink)
Cool SGClubber
Ruru-x3 is on a distinguished road

 
Ruru-x3's Avatar
 
Posts: 232
Join Date: Sep 2008
Likes: 0
Liked 0 Times in 0 Posts
Gender:

Re: Sec 4 Mathematics, Hire Purchase

OH shit. My teacher just went through this qns yesterday!!! I forgot to copy down the method to find it... I only know you nonid round off de...

__________________
Visit my deviantART page --> http://ruru-x3.deviantart.com
Ruru-x3 is offline   Add to Ruru-x3's Reputation Reply With Quote
Old 2nd April 2009, 11:52 AM   #10 (permalink)
Addicted SGClubber
-BAOBEII- is on a distinguished road

 
-BAOBEII-'s Avatar
 
Posts: 315
Join Date: Jan 2009
Likes: 0
Liked 0 Times in 0 Posts
Gender:

Re: Sec 4 Mathematics, Hire Purchase

Originally Posted by pastelpink View Post
Qns: The cash price of an air-conditioner was S$1800. Vernon bought it by paying monthly instalments of S$129 w/ zero downpayment, If the flat rate of interest is 6% p.a., find the no. of instalments he has to make before gaining ownership of the air-conditioner.


this is how I did it:
6% x 1800 = S$108 + S$1800 = S$1908
S$129x12 = S$1548 which means he wont be able to finish paying for the air conditioner within the first year. hence, I add another year's interest.
S$1908 + S$108 = S$2016
S$2016-S$1548 = S$468
S$468 / 129 = 3.6 round off to nearest no. = 4
4+12=16 therefore, Vernon has to make 16 instalments before gaining ownership of the air conditioner.

but the answer sheet states that the answer for this question is 15. why is that so?

please help!
I suppose you nid 2 count the downpayment and interest together 1st before assuming he din have enough to pay for 1st yr.

__________________
The most fearful thing is fear itself. Be brave and face up the reality.
-BAOBEII- is offline   Add to -BAOBEII-'s Reputation Reply With Quote
Old 2nd April 2009, 09:49 PM   #11 (permalink)
Experienced SGClubber
fathernature is a jewel in the roughfathernature is a jewel in the rough

 
fathernature's Avatar
 
Posts: 9,828
Join Date: Dec 2007
Likes: 19
Liked 28 Times in 26 Posts
Gender:

Re: Sec 4 Mathematics, Hire Purchase

u cannot round up got to round down

__________________
eh eh eh !!! =O
+ rep sia! If i help u lurhs (^_^)V

http://soundcloud.com/fathernature
www.youtube.com/xiiaoxuuesheng
fathernature is offline   Add to fathernature's Reputation Reply With Quote
Old 22nd April 2009, 11:14 PM   #12 (permalink)
Addicted SGClubber
ahjie is on a distinguished road

 
ahjie's Avatar
 
Posts: 347
Join Date: May 2008
Likes: 0
Liked 0 Times in 0 Posts
Gender:

Re: Sec 4 Mathematics, Hire Purchase

my understanding is 1,800*1.06/129 = approx 14.7 installments rounded up to 15.


total payment to be made = (1,800(principal) + 135(interest)) = 1,935
Number of installments = 1,935 / 129 = 15 exactly.

6% is interest per annum and its on a flat rate so i think u need to pro rate the interest payable.

anyway.. the answer will still be 15. only diff is the interest.

ahjie is offline   Add to ahjie's Reputation Reply With Quote
Old 24th April 2009, 07:25 AM   #13 (permalink)
Experienced SGClubber
lokey has a spectacular aura about

 
Posts: 1,014
Join Date: Mar 2009
Likes: 33
Liked 39 Times in 34 Posts
Gender:

Re: Sec 4 Mathematics, Hire Purchase

first year = 1800 x 1.06 = 1908
since he is paying at 129 x 12 = 1548 in first year
second year he left (1908 - 1548) x 1.06 = 381.6
he need to pay 381.6 / 129 = 2.958 ~ 3
Therefore he need to pay 12 + 3 = 15 installments
Am I right?

lokey is offline   Add to lokey's Reputation Reply With Quote
Reply

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Specialised in Mathematics Tuition (Sec 1-4) adwin Jobs & Services 0 9th February 2009 04:51 PM
O level books [Sec 3 and Sec 4] Anna_vn General Merchandise 1 23rd January 2009 11:33 AM
Need to EXCEL in Mathematics! sunshine01 Jobs & Services 2 16th November 2008 10:43 AM
Which part of sch life do you enjoy most? Pri, Sec or post sec? relief234 School Life 64 8th July 2007 02:14 AM

» Sponsors
Watch Free Movies Online
Celebrity Gossip
Food Delivery

» Facebook Fans
» What's Going On?
Title, Username, & Date
One Australian dollar could buy about $1.01 Singapore dollars
Elderly pair barred from Ipoh City Council for wearing Bermuda shorts
Hwa Chong student awarded Angus Ross Prize, continuing Singapore's 15-year streak
Tiong riding a bicycle on PIE causes accident; cannot claim insurance
Singapore Gov-controlled Media: September 12 is most probably the Election Day
[Official]UNISIM chit chat thread
Sign up for safer SingPass from Sunday
Dissatisfied old man makes music video of “SG Buildings Crumbling Down”
India: 1,400 school teachers resign in fake degree probe
PAP's strategy for Aljunied
Opposition parties ready, especially WP and SDP
South Koreans could be 'extinct' by 2750
Pair who uploaded upskirt videos to 'depraved' website jailed 12 weeks
Beach Road Army Market might be Shut Down at the End of 2015
Half of Japanese people aren't having sex
Serial molester, Huang Tian Yuan, jailed 5 months for molesting 2 women on bus
Prosecution of Amos Yee – group of citizens and parents expresses concern to PM Lee
51,000 Christians gather at Sports Hub to mark SG50; PM Lee thanks community
Thumbs up for Singapore-Johor Baru shuttle train
Vietnamese national jailed for corruption and molestation
Featured Photos
by aaudreygan
· · ·
Guy Photos
1521 photos
946 comments
by aaudreygan
· · ·
Girl Photos
4293 photos
4204 comments
by a8paris
· · ·
Guy Photos
1521 photos
946 comments
by a8paris
· · ·
Guy Photos
1521 photos
946 comments
by aaricia
· · ·
Girl Photos
4293 photos
4204 comments
by aaricia
· · ·
Girl Photos
4293 photos
4204 comments
by acedluffy
· · ·
Guy Photos
1521 photos
946 comments
by acedluffy
· · ·
Guy Photos
1521 photos
946 comments
by 0037
· · ·
Girl Photos
4293 photos
4204 comments
by 0037
· · ·
Girl Photos
4293 photos
4204 comments

 

All times are GMT +8. The time now is 01:46 AM.


Powered by vBulletin
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Copyright© 2004-2013 SGClub.com. All rights reserved.