## Q&A - PSLE Math

### Re: Q&A - PSLE Math

Thank you! I have one more question--

Mr Chan spent $2500 of her salary and saved the rest. When she increased her spending by 30%, her savings decreased by 25%. How much was her salary?

Mr Chan spent $2500 of her salary and saved the rest. When she increased her spending by 30%, her savings decreased by 25%. How much was her salary?

### Re: Q&A - PSLE Math

The above statement is mathematically saying this,wilburlim wrote:Thank you! I have one more question--

When she increased her spending by 30%, her savings decreased by 25%.

30% of $2500 = 1/4 of Saving at first

So "saving at first" is ________ ?

Hope you can solve from here.

Answer $5500

Last edited by Ender on Tue Aug 30, 2016 10:07 pm, edited 1 time in total.

### Re: Q&A - PSLE Math

Question: Keira had $60 more than Jo. When Koera gave 2/5 of her money to Jo, Jo had $4 more than Kiera. How much money did Jo have initially?

### Re: Q&A - PSLE Math

vvv

A: 1715161

Subject: Math

Level: P6

Tags:

Source:

^^^

Keira would have given Jo $32.

2/5 -> $32

5/5 -> $80

Jo had $80 - $60 = $20 at first

A: 1715161

Subject: Math

Level: P6

Tags:

Source:

^^^

From $60 more at first, to $4 lesser,wilburlim wrote:Question: Keira had $60 more than Jo. When Koera gave 2/5 of her money to Jo, Jo had $4 more than Kiera. How much money did Jo have initially?

Keira would have given Jo $32.

2/5 -> $32

5/5 -> $80

Jo had $80 - $60 = $20 at first

- Nebbermind
- KiasuGrandMaster
**Posts:**16632**Joined:**Tue Dec 22,**Total Likes:**168

### Re: Q&A - PSLE Math

Alternatively, just draw models like any pri schoolers.BigDevil wrote:vvv

A: 1715161

Subject: Math

Level: P6

Tags:

Source:

^^^

From $60 more at first, to $4 lesser,wilburlim wrote:Question: Keira had $60 more than Jo. When Koera gave 2/5 of her money to Jo, Jo had $4 more than Kiera. How much money did Jo have initially?

Keira would have given Jo $32.

2/5 -> $32

5/5 -> $80

Jo had $80 - $60 = $20 at first

**Before,**

Keira

+60, which is also [U+12][U+12][U+12]

**[U+12][U+12]**

Jo

**[u]After,**

Keira

[U+12][U+12][U+12]

Jo

[U][U][U][U] +

**[U+12][U+12]**

Therefore,

(Jo) 7U + 24 = (Keira) 3U + 36

**+ 4 (Jo has $4 more)**

=> 4U = 16

=> 5U = 20

### Re: Q&A - PSLE Math

Ender wrote:The value of 2/3 twenty cent equals to half of fifty cents value, can be modelled asSOS mum wrote:Hi, ps help. Many tks and God Bless:)

Yee Leng has some twenty cents and fifty cents coins.

2/3 of the total value of the twenty cents coins is the same as 1/2 of the total value of the fifty cents coins. If Yee Leng spends 4 fifty cent coins, the value of the twenty cents coins and the value of the remaining fifty cents coins will be the same. How many twenty cents coins does Yee Leng have?

Value of 20c = 3u

Value of 50c = 4uThank u very much. EnderBecoz 2/3 of 3u = 2u, which is half of the value of 50c coins. Therefore value of 50c is 2u x 2 = 4u

Spent 4 fifty cent is just another way of saying he spent $2.

4u - 3u = $2

1u= $2

Value of 20c = 3u = $6

Number of 20c coins = 6/0.2 = 30 ##.

### Re: Q&A - PSLE Math

hi, please help :

Keith and Mike had some chocolates in the ratio 2 : 5 When Mike gave away 40 chocolates to Keith and ate 20 chocolates himself, the ratio of keith’s chocolates to that of Mike’s chocolates became 2 : 1 How many chocolates did Mike have at first?

Keith and Mike had some chocolates in the ratio 2 : 5 When Mike gave away 40 chocolates to Keith and ate 20 chocolates himself, the ratio of keith’s chocolates to that of Mike’s chocolates became 2 : 1 How many chocolates did Mike have at first?

### Re: Q&A - PSLE Math

hi , another one. please help.

Tom wants to make a square with rectangular cards each measuring 8 cm by 6 cm .

How many such rectangular cards must he use to make the smallest possible square?

Tom wants to make a square with rectangular cards each measuring 8 cm by 6 cm .

How many such rectangular cards must he use to make the smallest possible square?

- Nebbermind
- KiasuGrandMaster
**Posts:**16632**Joined:**Tue Dec 22,**Total Likes:**168

### Re: Q&A - PSLE Math

doraemo wrote:hi, please help :

Keith and Mike had some chocolates in the ratio 2 : 5 When Mike gave away 40 chocolates to Keith and ate 20 chocolates himself, the ratio of keith’s chocolates to that of Mike’s chocolates became 2 : 1 How many chocolates did Mike have at first?

Before,

K =>

M =>

After,

K => + 40 => [U+20][U+20]

M => [U+20] (coz K:M is 2:1)

But, M gave away

**40**and ate

**20**

=>[U+20] +

**40**+

**20**=

**5U**

Therefore U = 20, and 5U = 100

### Re: Q&A - PSLE Math

vvv

A: 1715788

Subject: Math

Level: P6

Tags: LCM

Source:

^^^

24 / 8 -> 3

24 / 6 -> 4

Number of cards -> 3 x 4 = 12

A: 1715788

Subject: Math

Level: P6

Tags: LCM

Source:

^^^

LCM of 8, 6 -> 24doraemo wrote:hi , another one. please help.

Tom wants to make a square with rectangular cards each measuring 8 cm by 6 cm .

How many such rectangular cards must he use to make the smallest possible square?

24 / 8 -> 3

24 / 6 -> 4

Number of cards -> 3 x 4 = 12