Q&A - P4 Math

[MathIzzzFun]

ozora:

Hi all advisors,

need some help in this question.
I have some sweets. If I pack them in groups of 5, I will have 3 extra sweets. If I pack them in groups of 8, I will have 7 extra sweets. What is the min number of sweets do I have?
I used the following method and i got 23 but the answer key is 63 using the same method. why 63 and not 23?

Method :
x5 : 5, 10, 15, 20, 25, 30
----------------------------
+3: 8, 13 , 18, 23, 28, 33

x8: 8, 16, 24
-----------------
+7: 15, 23, 31

any advise?

hi

u r right

there was a discussion on similar problem before, and here are my views on that question - http://www.flickr.com/photos/62167097@N02/5711589516/in/photostream

cheers.

[ozora]

MathIzzzFun:

ozora:

Hi all advisors,

need some help in this question.
I have some sweets. If I pack them in groups of 5, I will have 3 extra sweets. If I pack them in groups of 8, I will have 7 extra sweets. What is the min number of sweets do I have?
I used the following method and i got 23 but the answer key is 63 using the same method. why 63 and not 23?

Method :
x5 : 5, 10, 15, 20, 25, 30
----------------------------
+3: 8, 13 , 18, 23, 28, 33

x8: 8, 16, 24
-----------------
+7: 15, 23, 31

any advise?

hi

u r right

there was a discussion on similar problem before, and here are my views on that question - http://www.flickr.com/photos/62167097@N02/5711589516/in/photostream

cheers.

thanks MathIzzzFun.. thought my method is wrong. okie now get the idea

[Champion]

Hi! Happy New Year to all experts here! :grphug:


Need help with the following 2 Maths Questions and appreciates your help with the a model diagram; :thankyou: very much.

1) Lionel bought a shirt with 2/7 of his money. He also bought a pair of jeans that cost $23 more than the shirt. If he had $10 left, how much did the pair of jeans cost?


2) 7/10 of the spectators in a stadium are adults.
There are 184 more adults than children.
(a) How many children are there altogether?
(b) 5/6 of the children are boys, how many more boys than girls are there?

[MathIzzzFun]

Champion:

Hi! Happy New Year to all experts here! :grphug:


Need help with the following 2 Maths Questions and appreciates your help with the a model diagram; :thankyou: very much.

1) Lionel bought a shirt with 2/7 of his money. He also bought a pair of jeans that cost $23 more than the shirt. If he had $10 left, how much did the pair of jeans cost?


2) 7/10 of the spectators in a stadium are adults.
There are 184 more adults than children.
(a) How many children are there altogether?
(b) 5/6 of the children are boys, how many more boys than girls are there?

Hi

rushing out.. here's the model for Q1...

http://i41.tinypic.com/2i0rpcp.jpg\">

cheers.

[tianzhu]

Champion:

2) 7/10 of the spectators in a stadium are adults.
There are 184 more adults than children.
(a) How many children are there altogether?
(b) 5/6 of the children are boys, how many more boys than girls are there?

Hi

While waiting for the arrival of 财神, I’ll try to give some pointers for drawing the MD.

Draw 7 boxes to show the number of adults and 3 boxes to show the number of children.

So we’ve 4 boxes ------ 184 and hence 1 box ----- 46

(a)Number of children ----- 46*3 ----- 138

For the second part of the question, draw 5 boxes to show the number of boys and 1 box to show the number of girls.

Number of boys ----- 5 parts
Number of girls ----- 1 part

6 parts ----- 138
1 part ------ 23

4 parts ----- 23*4 ----- 92

(b)There are 92 more boys than girls.

PS ----- The boxes for (a) and (b) are of different measures and kinds, hence different sizes.

If you need the MD, please let me know.I'll do it at a later time.

Wishing everyone in KSP, a very Happy and Prosperous Chinese New Year.

Best wishes

[MathIzzzFun]

Champion:

Hi! Happy New Year to all experts here! :grphug:


Need help with the following 2 Maths Questions and appreciates your help with the a model diagram; :thankyou: very much.

1) Lionel bought a shirt with 2/7 of his money. He also bought a pair of jeans that cost $23 more than the shirt. If he had $10 left, how much did the pair of jeans cost?


2) 7/10 of the spectators in a stadium are adults.
There are 184 more adults than children.
(a) How many children are there altogether?
(b) 5/6 of the children are boys, how many more boys than girls are there?

Hi

here's the MD for Q2 ..

http://i43.tinypic.com/5ewnxf.jpg\">

cheers.

[Champion]

:salute: :salute: to MathIzzzFun & Daddy Tianzhu for the answers! :celebrate:

[htn]

Hi,need help for the following:


1.James has 36 blue marbles and 54 red marbles. He wants to put an equal number of blue and red marbles into somes boxes. How many boxes does he need at most?

2.Esther spent 1/2 of her money on some pies and 4/7 of her remaining money on 8 loaves of bread. Each loaf of bread cost thrice as much as a pie. How many pies did she buy?

TIA

[HAPPYH]

I find this thread useful esp. to learn fractions. When I saw the fraction questions in the P3 assessment books, I was really blur. Looking at the answers given by parents here, I am seeing some light for fractions:) Thank you so much.

[chloecube]

htn:

Hi,need help for the following:


1.James has 36 blue marbles and 54 red marbles. He wants to put an equal number of blue and red marbles into somes boxes. How many boxes does he need at most?

2.Esther spent 1/2 of her money on some pies and 4/7 of her remaining money on 8 loaves of bread. Each loaf of bread cost thrice as much as a pie. How many pies did she buy?

TIA

is the answer for nos 2, 42 pies?