Q&A  P5 Math (Page 174)
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Q&A  P5 Math
Re: Q&A  P5 Math
tianzhu wrote:elisammom wrote:Hi pls help. This is the 2011 CA1 Nanhua paper
TIA
Hi
You may use "Listing"
Total number of students for A, C,D and E  77
Find multiples of 5 and 7 after 77
Multiples of 5  80,85,90,95
Multiples of 5 + 1  81,86,91,96
Multiples of 7  84, 91
Multiples of 7 + 5  89, 96
The common number is 96
Least number of students in B  9677  19
Hope this helps
Best wishes
Very clear! Thanks a lot!
 elisammom
 OrangeBelt
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Re: Q&A  P5 Math
Trina wrote:Please assist with this question:
There are 40 pupils in a class. Each boy donated $3 and each girl donated $2. The boys donated $30 more than the girls.
How many boys are there?
How many girls are there?
Thanks!
Assume all boys donated, total amount > 40 x $3 = $120
$120  $30 = $90  excess amount to be reduced by girls' donation
Number of girls = $90/($3+$2) = 18
Number of boys = 4018 = 22
cheers.

MathIzzzFun  KiasuGrandMaster
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Re: Q&A  P5 Math
MathIzzzFun wrote:Trina wrote:Please assist with this question:
There are 40 pupils in a class. Each boy donated $3 and each girl donated $2. The boys donated $30 more than the girls.
How many boys are there?
How many girls are there?
Thanks!
Assume all boys donated, total amount > 40 x $3 = $120
$120  $30 = $90  excess amount to be reduced by girls' donation
Number of girls = $90/($3+$2) = 18
Number of boys = 4018 = 22
cheers.
Thanks but still dont get it.. Can provide narration? Thanks
 Trina
 GreenBelt
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Re: Q&A  P5 Math
Luke had $140 and Issac had $92 at first. After they spent an equal amount of money, Luke had 4 times as much money as Isaac. How much did each of them spend?
(not sure if this has been asked before, pls refer me to correct page. Thanks!)
(not sure if this has been asked before, pls refer me to correct page. Thanks!)
 ttyh
 BlueBelt
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Re: Q&A  P5 Math
ttyh wrote:Luke had $140 and Issac had $92 at first. After they spent an equal amount of money, Luke had 4 times as much money as Isaac. How much did each of them spend?
(not sure if this has been asked before, pls refer me to correct page. Thanks!)
3 units > $140  $92 = $48
1 unit > $48 / 3 = $16
$92  $16 = $76
Each of them spent $76
 php
 KiasuGrandMaster
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Re: P5 Onsponge Conquer Problem Sums Answer key
If you need the whole answer key, I don't think I could help. But if you just need some answers from the answer key, then you can go to the website. http://www.onsponge.com/shop/onlinesolutions.html
Hope I helped
Hope I helped

Trevortan  GreenBelt
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Re: Q&A  P5 Math
Serene, Fabian and Eileen shared their prize money of $4100 among themselves. Twice of Serene's share was equal to 5 times of Fabian's share. 4 times of Serene's share was also equal to 3 times of Eileen's share. Calculate Serene's share.
Help ...... please. How should the answers be presented and is this really a P5 appropriate question?
Thank you very much.
Help ...... please. How should the answers be presented and is this really a P5 appropriate question?
Thank you very much.
 Oracle
 OrangeBelt
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Re: Q&A  P5 Math
Oracle wrote:Serene, Fabian and Eileen shared their prize money of $4100 among themselves. Twice of Serene's share was equal to 5 times of Fabian's share. 4 times of Serene's share was also equal to 3 times of Eileen's share. Calculate Serene's share.
Help ...... please. How should the answers be presented and is this really a P5 appropriate question?
Thank you very much.
Hi Oracle,
One Possible Solution:
Twice of Serene's share was equal to 5 times of Fabian's share.
This means that ratio of Serene's share to Fabian's share is 5:2
(Just interchange the 2 numbers)
4 times of Serene's share was also equal to 3 times of Eileen's share.
This means that ratio of Serene's share to Eileen's share is 3:4
(Just interchange the 2 numbers)
Ratio of Serene's share to Fabian's share is 5:2
Ratio of Serene's share to Eileen's share is 3:4
Ratio of Serene's share to Fabian's share to Eileen's share is 15:6:20
15 + 6 + 20 = 41 units
41 units = $4100
Can you work from here?
Cheers
speedmaths.com
.
 speedmaths.com
 KiasuGrandMaster
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Re: Q&A  P5 Math
Oracle wrote:Serene, Fabian and Eileen shared their prize money of $4100 among themselves. Twice of Serene's share was equal to 5 times of Fabian's share. 4 times of Serene's share was also equal to 3 times of Eileen's share. Calculate Serene's share.
Help ...... please. How should the answers be presented and is this really a P5 appropriate question?
Thank you very much.
cheers.

MathIzzzFun  KiasuGrandMaster
 Posts: 2354
 Joined: Wed Mar 09, 2011 11:49 pm
 Total Likes: 5
Re: Q&A  P5 Math
Trina wrote:MathIzzzFun wrote:Trina wrote:Please assist with this question:
There are 40 pupils in a class. Each boy donated $3 and each girl donated $2. The boys donated $30 more than the girls.
How many boys are there?
How many girls are there?
Thanks!
Assume all boys donated, total amount > 40 x $3 = $120
$120  $30 = $90  excess amount to be reduced by girls' donation
Number of girls = $90/($3+$2) = 18
Number of boys = 4018 = 22
cheers.
Thanks but still dont get it.. Can provide narration? Thanks
cheers.

MathIzzzFun  KiasuGrandMaster
 Posts: 2354
 Joined: Wed Mar 09, 2011 11:49 pm
 Total Likes: 5
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