Welcome to Test-paper.info
Wednesday, December 13 2017 @ 04:46 PM CST
 Select a Forum » General Chat » Primary 1 Matters » Primary 2 Matters » Primary 3 Matters » Primary 4 Matters » Primary 5 Matters » Primary 6 Matters » Question, Feedback and Comments » Education Classified
 Forum Index >  Test Paper Related >  Primary 4 Matters P4 Fraction - Redraw Rremainder?
 | Printable Version
 By: jyxk (offline)  Saturday, August 22 2015 @ 12:56 AM CDT (Read 1164 times)
jyxk

Hi,

Tom has some balls. He used 1/5 of balls and gave 1/3 of the remainder to Jane. Tom has 8 balls left. How many balls did Tom has at first?

Newbie

Registered: 12/31/14
Posts: 1

 By: echeewh (offline)  Sunday, August 23 2015 @ 12:20 AM CDT
echeewh

Hey <jyxk>

Following is my worked solution :

Start model with 5 parts as shown:

|--|--|--|--|--|

After one part (1/5) was used, it is left with 4 parts (remainder)

As (1/3) of the remainder was given to Jane (J), then find the common multiple of 3, 4, which is 12. I.e. each of these remaining 4 parts is split or subdivided into 3 units (u), thus forming a total of 12u. Logically, the one part (1/5) that was used is also split into 3u.

Hence the model above will comprise 15u in all.

(1/5) used = 3u
(1/3) of the remainder to J = (1/3) × (12u) = 4u

12u - 4u = 8u

Given Tom(T) was left with 8 balls,

8u --> 8
1u --> 1

Total balls (at first) = 15u --> 15 balls

======

Trust this helps.

Do let me know again if there's clarifications.

Cheers,
Edward

Active Member

Registered: 04/21/11
Posts: 627

 All times are CST. The time is now 04:46 pm.
 Normal Topic Locked Topic Sticky Topic
 New Post Sticky Topic w/ New Post Locked Topic w/ New Post
 View Anonymous Posts Able to Post HTML Allowed Censored Content