## Q&A - PSLE Math

### Re: Q&A - PSLE Math

Subject: {Math}

Level: {P6}

Tags: {percentage}

Source: {P6 Maths 2015 Preliminary Examination 2015 - Singapore Chinese Girl's School}

Please help me solve this problem.

The number of children in a town decreased to 8827, while the number of adults increased by 42% to 15194. The total number of people decreased by 259.

Q1. What is the increase in number of adults?

Q2. What is the percentage decrease in the total number of children?

Level: {P6}

Tags: {percentage}

Source: {P6 Maths 2015 Preliminary Examination 2015 - Singapore Chinese Girl's School}

Please help me solve this problem.

The number of children in a town decreased to 8827, while the number of adults increased by 42% to 15194. The total number of people decreased by 259.

Q1. What is the increase in number of adults?

Q2. What is the percentage decrease in the total number of children?

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

### Re: Q&A - PSLE Math

Subject: {Math}RJ_164 wrote:Subject: {Math}

Level: {P6}

Tags: {percentage}

Source: {P6 Maths 2015 Preliminary Examination 2015 - Singapore Chinese Girl's School}

Please help me solve this problem.

The number of children in a town decreased to 8827, while the number of adults increased by 42% to 15194. The total number of people decreased by 259.

Q1. What is the increase in number of adults?

Q2. What is the percentage decrease in the total number of children?

Level: {P6}

Tags: {percentage}

Source: {P6 Maths 2015 Preliminary Examination 2015 - Singapore Chinese Girl's School}

Q1.

100 + 42 = 142

142% ------- 15194

1% ------- 15194/142 = 107

100% ------- 107 x 100 =10700

15194 - 10700 = 4494

Q2.

4494 + 259 = 4753 (decrease in the number of children)

4753 + 8827 = 13580 (total number of children at first)

(4755/13580) x 100% = 35%

Ans : Q1. 4494; Q2. 35%.

### Re: Q&A - PSLE Math

Level : {p6}

Tag :{Volume}

Source : {2014 prelims Nanyang q14}

Hi all,

Pls help on the below !

Tag :{Volume}

Source : {2014 prelims Nanyang q14}

Hi all,

Pls help on the below !

### Re: Q&A - PSLE Math

vvv

A: 1696117

Subject: {Math}

Level: {P6}

Tags: {Internal transfer, total same}

Source: {}

^^^

Box B: 80 red, 100 white

Total: 280 red, 190 white

After transfer,

Box B: 3u red, 2u white

Box A: (280 - 3u) red, (190 - 2u) white

280 - 3u = 190 - 2u

3u - 2u = 280 - 190

1u = 90

Box A after transfer:

Red: 280 - 3u = 10

White: 190 - 2u = 10

Number of marbles transferred out of A -> 290 - 20 = 270

A: 1696117

Subject: {Math}

Level: {P6}

Tags: {Internal transfer, total same}

Source: {}

^^^

Box A: 200 red, 90 whitebelnanna wrote:

Can someone please help. Thanks in advance

Box B: 80 red, 100 white

Total: 280 red, 190 white

After transfer,

Box B: 3u red, 2u white

Box A: (280 - 3u) red, (190 - 2u) white

280 - 3u = 190 - 2u

3u - 2u = 280 - 190

1u = 90

Box A after transfer:

Red: 280 - 3u = 10

White: 190 - 2u = 10

Number of marbles transferred out of A -> 290 - 20 = 270

### Re: Q&A - PSLE Math

vvv

A: 1696145

Subject: {Math}

Level: {P6}

Tags: {Internal transfer, total same}

Source: {}

^^^

S -> 100u ribbons

L -> 100p buttons

After transfer,

S -> 20u ribbons, 10p butttons

L -> 80u ribbons, 90p buttons

20% of Shyamala's collections were ribbons

20u -> 20%

10p -> 80%

10p = 80u

Lily had 480 more buttons than ribbons

90p - 80u = 480

90p - 10p = 480

80p = 480

1p = 6

Lily had 100 x 6 = 600 buttons at first

A: 1696145

Subject: {Math}

Level: {P6}

Tags: {Internal transfer, total same}

Source: {}

^^^

In the beginning,belnanna wrote:

S -> 100u ribbons

L -> 100p buttons

After transfer,

S -> 20u ribbons, 10p butttons

L -> 80u ribbons, 90p buttons

20% of Shyamala's collections were ribbons

20u -> 20%

10p -> 80%

10p = 80u

Lily had 480 more buttons than ribbons

90p - 80u = 480

90p - 10p = 480

80p = 480

1p = 6

Lily had 100 x 6 = 600 buttons at first