Q&A - PSLE Math

[youngtay]

please help


Given that 2/3 of Xavier’s money is equal to 75% of Ian’s money, what fraction of Ian’s money is the total sum of money?
what is the answer, 8/17 or 17/8,and why
TIA

[ck123]

Hi youngtay


Answer is 17/8.

eg. May has $2 and Jane has $3.
Question : What fraction of Jane’s money is May’s?
Answer : 2/3
Question : What is the fraction of Jane’s $ to May’s?
Answer : 3/2
so just need to remember after the word is is what you want.

Hope is help…

[youngtay]

ck123:

Hi youngtay


Answer is 17/8.

eg. May has $2 and Jane has $3.
Question : What fraction of Jane's money is May's?
Answer : 2/3
Question : What is the fraction of Jane's $ to May's?
Answer : 3/2
so just need to remember after the word is is what you want.

Hope is help..

ck123

Thanks for your help.

[ck123]

Question from nanyang sa1 2011 paper 2 q15

Mr Yama went shopping and bought 8 shirts from the first shop. Then, he bought 3 more identical shirts at $42.59 each from the second shop. The average cost of all his shirts was decreased by $1.50. What was the total cost of the 11 shirts?

Anyone done above question before please help cause I do not have the answer

Thanks

[tianzhu]

ck123:

Question from nanyang sa1 2011 paper 2 q15

Mr Yama went shopping and bought 8 shirts from the first shop. Then, he bought 3 more identical shirts at $42.59 each from the second shop. The average cost of all his shirts was decreased by $1.50. What was the total cost of the 11 shirts?

Hi

I believe you just want to confirm the answer.

It is $512.49

Best wishes

[ck123]

Hi tianzhu


Don’t mind to show me the steps brain a bit not working now…

Thanks

[atutor2001]

ck123:

Question from nanyang sa1 2011 paper 2 q15

Mr Yama went shopping and bought 8 shirts from the first shop. Then, he bought 3 more identical shirts at $42.59 each from the second shop. The average cost of all his shirts was decreased by $1.50. What was the total cost of the 11 shirts?

Anyone done above question before please help cause I do not have the answer

Thanks

Must first recognise that the new average price is more than the actual cost ($42.59) of a new shirt which is why the average price of the existing shirts dropped.

Since the average price dropped by $1.50, so each of the 8 shirts contributes $1.50 to the 3 new shirts.
Total amount from the 8 shirts = 8 x $1.50 = $12
This $12 is distributed equally among the 3 new shirts.
Each new shirt gets $12/3 = $4
The new average cost is higher than the cost of each new shirt by $4.
New average cost = $4 + $42.59 = $46.59

Total cost of 11 shirt = 11 x $46.59 = $512.49

[ck123]

Thanks atutor2001


Need help with this question
http://i53.tinypic.com/2jfjg38.png[/IMG] x.png[/img]

Answer given : 43.73 sqcm

Thanks

[tianzhu]

ck123:

Thanks atutor2001


Need help with this question
http://i53.tinypic.com/2jfjg38.png[/IMG] x.png[/img]

Answer given : 43.73 sqcm

Thanks

Hi

Your image is too small.

Please enlarge it.

Best wishes

[Daddy]

Hi MathIzzzfun,


Sorry to ask you some questions that I did not understand. :?

Why did the ribbons have 6 blocks instead of 3? From \"Mary bought 2/3 of ribbon\"
Why did the clips have 6 blocks also? How did you get it? Thanks..

http://i56.tinypic.com/2lwn0gw.jpg\">


Thanks.