Q&A - P3 Math

[rrjan]

Thanks ksi for the kind enlightenment. Finally understand :). Cheers.

[corneyAmber]

rrjan:

Thanks ksi for the kind enlightenment. Finally understand :). Cheers.

You are welcome.

[tianzhu]

allcc6:

Can MD be used for this question? If yes, pls advise. Thanks.

Hi

I don’t think MD is suitable.

Best wishes

[raysusan]

please help me on this Qns


jean's age was 3/4 lily's age 20 years ago. jean's age was 7/9 lily's age 16 years ago. how old is lily now??

TIA :?:

[MathIzzzFun]

raysusan:

please help me on this Qns


jean's age was 3/4 lily's age 20 years ago. jean's age was 7/9 lily's age 16 years ago. how old is lily now??

TIA :?:

Hi raysusan,

hope this helps

http://i54.tinypic.com/qzr8qw.jpg\">

cheers.

[tianzhu]

Hi mama_10


Good Morning.

As usual, I've shown more MD than necessary to show the flow of events.

Hope this helps.

Best wishes.

http://farm4.static.flickr.com/3211/5861787076_0fe12b8b7c_z.jpg\">

[buds]

Help, anyone? :please:


A bus started it's journey from a bus interchange. At the first stop, 1/3 of the passengers alighted and 18 people boarded. At the next stop, 1/4 of the new total number of passengers alighted and 9 people boarded. Now there are 60 passengers. How many passengers started the trip from the bus interchange?

[corneyAmber]

buds:

Help, anyone? :please:


A bus started it's journey from a bus interchange. At the first stop, 1/3 of the passengers alighted and 18 people boarded. At the next stop, 1/4 of the new total number of passengers alighted and 9 people boarded. Now there are 60 passengers. How many passengers started the trip from the bus interchange?

This question uses work backwards approach.

60-9 = 51
51 people -> 3 parts (1 part alighted)
so 1 part -> 17 people
Number of people on board before 1/4 alighted -> 51 + 17 = 68
68-18 = 50
50 people -> 2 parts ( 1 part alighted)
so 1 part -> 25 people

Hence original number of people on board = 25x3 = 75

In diagram form:
http://i54.tinypic.com/24v8m4i.jpg\">

[buds]

Thanks ksi, appreciate the quick reply! :hugs:

I switch off liao, told her I won't help.
She saw I was browsing so.....

DD1 says BIG :thankyou: to ksi!

Geez.. Dun I wish she'd be more
like you.. With Po's tum plus Maths
flair. But alas, she only has those buns
and noodles only up there each time she
needs to do work.

[corneyAmber]

You are welcome buds & dd… Your DD1 is one very hardworking girl…ksi kudos to her.