I am careless at times too. And you are most welcome; MathWithModels!MathWithModels wrote:Yes, sorry. I was careless in part b. Thanks for the correction, alfretztay!Daddy wrote:

MathWithModels.

## Q&A - PSLE Math

- alfretztay
- KiasuGrandMaster
**Posts:**1199**Joined:**Sun Sep 12,**Total Likes:**5

### Re: Q&A - PSLE Math

- PlayfulFairy
- BlueBelt
**Posts:**272**Joined:**Tue Oct 07,**Total Likes:**2

### Re: Q&A - PSLE Math

Please help me with these sums.. Thanks !

1) Mdm Siti made some jellies. She gave 4 less than 50% of all the jellies to her mother. She also gave 6 more than 1/4 of the rest of the jellies to her friends. She then had 15 jellies left. How many jellies did she make together at first ? (48 jellies)

2) Jane used some beads in the morning for her handicraft. In the afternoon, she used 62.5% of the remaining beads. As a result, the ratio of the number of beads left to the number of beads at first was 15:58. What was the percentage increase in beads that she used in the afternoon when compared to the morning? (38.9%)

1) Mdm Siti made some jellies. She gave 4 less than 50% of all the jellies to her mother. She also gave 6 more than 1/4 of the rest of the jellies to her friends. She then had 15 jellies left. How many jellies did she make together at first ? (48 jellies)

2) Jane used some beads in the morning for her handicraft. In the afternoon, she used 62.5% of the remaining beads. As a result, the ratio of the number of beads left to the number of beads at first was 15:58. What was the percentage increase in beads that she used in the afternoon when compared to the morning? (38.9%)

- MathWithModels
- YellowBelt
**Posts:**11**Joined:**Sun Dec 28,

### Re: Q&A - PSLE Math

Hi PlayfulFairy,PlayfulFairy wrote:Please help me with these sums.. Thanks !

1) Mdm Siti made some jellies. She gave 4 less than 50% of all the jellies to her mother. She also gave 6 more than 1/4 of the rest of the jellies to her friends. She then had 15 jellies left. How many jellies did she make together at first ? (48 jellies)

We are given some numbers, 50% and 1/4. So let's divide the jellies into quarters. So we have 4u jellies to start with.

She gave 4 less than half to her mother.

This means Siti's mother has 2u - 4 jellies.

So, Siti has 4u - (2u - 4) = 2u + 4 jellies left.

1 / 4 of the remainder is (2u + 4) / 4 = u/2 + 1

Siti gave 6 more than this to her friends.

So her friends have u/2 + 1 + 6 = u/2 + 7 jellies.

Siti has 15 jellies left.

All the jellies = Jellies to mother + Jellies to friends + Jellies left

4u = (2u - 4) + (u/2 + 7) + 15

Bringing all the

*u*s to the left hand side

4u - 2u - u/2 = 15 + 7 - 4

3u / 2 = 18

u = 12

So, all the jellies are 4u = 4 x 12 = 48 jellies.

MathWithModels

Last edited by MathWithModels on Fri Jan 09, 2015 11:46 am, edited 1 time in total.

### Re: Q&A - PSLE Math

PlayfulFairy wrote:Please help me with these sums.. Thanks !

1) Mdm Siti made some jellies. She gave 4 less than 50% of all the jellies to her mother. She also gave 6 more than 1/4 of the rest of the jellies to her friends. She then had 15 jellies left. How many jellies did she make together at first ? (48 jellies)

2) Jane used some beads in the morning for her handicraft. In the afternoon, she used 62.5% of the remaining beads. As a result, the ratio of the number of beads left to the number of beads at first was 15:58. What was the percentage increase in beads that she used in the afternoon when compared to the morning? (38.9%)

- PlayfulFairy
- BlueBelt
**Posts:**272**Joined:**Tue Oct 07,**Total Likes:**2

### Re: Q&A - PSLE Math

Thank you so much for all who responded!!

I am encountering great difficulty solving problem sums involving heuristics and DD is taking PSLE in a few months time. How can I brush up my skills? :$

I am encountering great difficulty solving problem sums involving heuristics and DD is taking PSLE in a few months time. How can I brush up my skills? :$

### Nanyang 2011 ca1 question

Jane and Ris had 255 sweets altogether. Jane had 15 sweets than Iris. Jane gave away 25% as many sweets as Iris. She was left with twice as many sweets as iris. Please Help!!!

### Re: Nanyang 2011 ca1 question

u are posting in the wrong thread - there's a thread Q&A for Px Maths for each level...