Sign Up!
Welcome to
Sunday, February 25 2018 @ 03:31 PM CST
 Forum Index >  Test Paper Related >  Primary 6 Matters
 Maths Question 8
   |  Printable Version
By: shirley wee (offline)  Monday, April 08 2013 @ 06:02 AM CDT (Read 781 times)  
shirley wee

Hi everybody! I'm stuck with this maths question. May you help me? Please show your working clearly using tabulation method.

Qn 1. A man can finish painting his flat in 20 days. If his wife paints together with him, they can finish painting in 12 days. How many days would it take his wife to paint the flat by herself?

Forum Chatty

Registered: 02/28/12
Posts: 68

Profile Email    
By: echeewh (offline)  Monday, April 08 2013 @ 08:03 AM CDT  

Hey Shirley,

This is a typical "Rate" kind of question.

By the way, are you able to handle Q5 on your own? Did you also check your email to see if there is any typo error with the numbers in Q6?

Following pls find my worked solution:

M: paints (1/20) of the flat in 1 day
M+W: paints (1/12) of the flat in 1 day

So, in 1 day, W paints [(1/12) - (1/20)] of the flat.

(1/12) - (1/20) = (5/60) - (3/60)
= (2/60) = 1/30

Hence, W would take 30 days to paint by herself.


Trust this helps.

Do let me know again if this is different from your Answerkey or if there's further clarification.


Forum Active Member
Active Member

Registered: 04/21/11
Posts: 627

Profile Email    

 All times are CST. The time is now 03:31 pm.
Normal Topic Normal Topic
Locked Topic Locked Topic
Sticky Topic Sticky Topic
New Post New Post
Sticky Topic w/ New Post Sticky Topic w/ New Post
Locked Topic w/ New Post Locked Topic w/ New Post
View Anonymous Posts 
Able to Post 
HTML Allowed 
Censored Content