Q&A - P4 Math

[just888]

Bunny27:

Sorry, another question need help:

length of pink ribbon is 48m, yellow ribbon is 60m. Mr Ramah wants to buy an equal length of pink & yellow ribbons. He can only buy the ribbons in full rolls. What is the least number of rolls of pink & yellow ribbon he can buy?


Thanks

Pink ribbon is 48m
Yellow ribbon is 60m

The common divider for the 2 ribbons are 2,4,6,12
Hence the max common length is 48x60 = 2880
Minimum common length = 2880/12 = 240

Hence no of pink rolls = 240/48 = 5
and no of yellow rolls = 240/60 = 4

[Bunny27]

just888:

Bunny27:

Sorry, another question need help:

length of pink ribbon is 48m, yellow ribbon is 60m. Mr Ramah wants to buy an equal length of pink & yellow ribbons. He can only buy the ribbons in full rolls. What is the least number of rolls of pink & yellow ribbon he can buy?


Thanks

Pink ribbon is 48m
Yellow ribbon is 60m

The common divider for the 2 ribbons are 2,4,6,12
Hence the max common length is 48x60 = 2880
Minimum common length = 2880/12 = 240


Thanks for the help...

Hence no of pink rolls = 240/48 = 5
and no of yellow rolls = 240/60 = 4

[usaik]

Hi,

I need help with the following question. What should the correct answer be?

http://i51.tinypic.com/294q7w8.jpg\">

TIA

[just888]

usaik:

Hi,

I need help with the following question. What should the correct answer be?

http://i51.tinypic.com/294q7w8.jpg\">

TIA

My answer is 8. 4 lines cut through the triangles and 4 lines in between the 2 triangles.

[usaik]

Hi just888,


Thank you so much for your kind reply.
Really need more advice from you as I still couldn’t figure it out. As there are 8 triangles, should there be 8 lines lines cutting through the triangles and 8 lines in between every 2 triangles?

TIA

[tianzhu]

usaik:

Hi just888,


Thank you so much for your kind reply.
Really need more advice from you as I still couldn't figure it out. As there are 8 triangles, should there be 8 lines lines cutting through the triangles and 8 lines in between every 2 triangles?

TIA

Hi

Please refer to illustration 2 of this link.

http://www.education.vic.gov.au/studentlearning/teachingresources/maths/mathscontinuum/space/Sp35001aP.htm

It should help you to answer your question.

Best wishes

[just888]

tianzhu:

usaik:

Hi just888,


Thank you so much for your kind reply.
Really need more advice from you as I still couldn't figure it out. As there are 8 triangles, should there be 8 lines lines cutting through the triangles and 8 lines in between every 2 triangles?

TIA

Hi

Please refer to illustration 2 of this link.

http://www.education.vic.gov.au/studentlearning/teachingresources/maths/mathscontinuum/space/Sp35001aP.htm

It should help you to answer your question.

Best wishes

Hi Usaik,

I said 4 coz, the line cutting through 1 of the triangle is the same line as the one cutting through the triangle opposite it. Therefore we do not consider 2 lines, but count as 1 instead. Hence total for the figure is 8.

As u see in the http://www.education.vic.gov.au/studentlearning/teachingresources/maths/mathscontinuum/space/Sp35001aP.htm shared by tianzhu.

[Muffins]

Sorry guys, but i beg to differ. From tianzhu’s link, we can see from illustration 2 that a line can have another one running next to it, and it is counted differently. Thus, i think 8 is the correct answer…

[chokos]

Hi all,

Need help for the following question:
--------------------------------------------
There are a total of 28 chickens and cows in a farm. If the total number of cows’ legs is 40 more than the total number of chickens’ legs, find the number of
a) chickens in the farm (answer: 12)
b) cows in the farm (answer: 16)
Is it possible to get the answer without using ‘Guess & check’ method?
Thanks in advance.

[tianzhu]

chokos:

Hi all,

Need help for the following question:
--------------------------------------------
There are a total of 28 chickens and cows in a farm. If the total number of cows' legs is 40 more than the total number of chickens' legs, find the number of
a) chickens in the farm (answer: 12)
b) cows in the farm (answer: 16)
Is it possible to get the answer without using 'Guess & check' method?
Thanks in advance.

Hi

Your question is similar to this one, apply the same strategy and you should be able to solve it.

There are 44 cars & bicycles. There are 128 more car wheels than bicycles. How many car and bicycle are there?

For every increase of 1 chicken, the difference in the number of legs drops by 6

112 - 40 ----- 72
72/6 ----- 12

Chickens ----- 12
Cows ----- 16

Best wishes.

http://farm6.static.flickr.com/5092/5424577928_4b58b5019e_z.jpg\">