Q&A - PSLE Math

[tianzhu]

Hi moderator


Please help to delete.

Best wishes

[Eddow]

http://i51.tinypic.com/x1n6zl.png\">

Answer given: (b) ~83.91 cm

Pls wait for Uncle tianzhu / MathIzzzFun to provide worked solutions.
Thks.[/quote]

Thanks Tianzhu for the solution. Maybe this might be easier, as I coundn't figure out the rotation myself... :?

Given the 135 degree, angle ODB = 45 degree.
If you draw a line joining OT, angle OTE = 45 degree (half of 90 degree of square) . This straight away give OT = DB.
And the rest of the calculation applies..

[andante]

Eddow:

http://i51.tinypic.com/x1n6zl.png\">

Answer given: (b) ~83.91 cm

Pls wait for Uncle tianzhu / MathIzzzFun to provide worked solutions.
Thks.

Thanks Tianzhu for the solution. Maybe this might be easier, as I coundn't figure out the rotation myself... :?

Given the 135 degree, angle ODB = 45 degree.
If you draw a line joining OT, angle OTE = 45 degree (half of 90 degree of square) . This straight away give OT = DB.
And the rest of the calculation applies..[/quote]

Hi,
I agree with you as the quadrilateral can be easily proved to be parallelogram, thus OT=DB.

[tianzhu]

Hi moderators


Please help to delete this post.

Best wishes

[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