Q&A - P4 Math

[Jamesbond]

MathIzzzFun:

Jamesbond:

There were some passengers on board an MRT train which began its journey from Jurong East station.At the first stop,5/8 of the passengers alighted and 16 passengers got in.At the second stop,half the passengers on the train got of and 23 passengers boarded the train.At the next stop,4/7 of the passengers alighted and 66 remained on the train.How many passengers did the train have at the start of its journey?

Can someone please help me fast? I have to hand up my school homework tomorrow
I would really appreciate your help

Hi
work backwards..

In the end, 66 remained = 3/7 of passengers after 2nd stop.

after 2nd stop --> 66/3 x 7 = 154 passengers on board
154 - 23 = 131 (after 1/2 the passengers got off)--> 1/2 the passengers after 1st stop

after 1st stop --> 2 x 131 = 262 passengers on board
262 - 16 = 246 (after 5/8 alighted) --> 3/8 of passengers at start of journey
Number of passengers at start of journey = 246/3 x 8 = 656

cheers.

:thankyou:

[Jamesbond]

ksi:

Moderator Note:


Jamesbond, please read the posting rules and please do not start new thread for your math questions.

I am supposed to click the new topic on the left side and click submit right...I did that only...was I wrong?

[MathIzzzFun]

Jamesbond:

2/3 of Sunny's marbles is equal to 3/5 of Tin's marbles.

If sunny has 4 marbles less than Tin, how many marbles does Tin have?
Pl explain me...Thanks in advance.

Hi

2/3 of Sunny = 3/5 of Tin
6/9 of Sunny = 6/10 of Tin
Sunny's marbles --> 9 units
Tin's marbles --> 10 units
1 unit --> 4 marbles
Tin had 4 x 10 = 40 marbles

cheers.

[MathIzzzFun]

Jamesbond:

At a school swimming event, 1/3 of the sudents were boys. Given that 2/5 of the boys and 3/5 of the girls did not know how to swim, how many student were there altogether if there were 490 swimmers at the event?

Pl explain. Thanks in advance.

Total number of students --> 30 units
Boys --> 10 units
Girls --> 20 units

Swimmers:
3/5 of boys --> 6 units
2/5 of girls --> 8 units

Total number of swimmers = 14 units
14 units --> 490
1 unit --> 35

Total number of students --> 30 x 35 = 1050

cheers.

[Jamesbond]

Mala bought 24.6 m of cloth at $6 per metre. She used 1/3 of it to make a curtain and 0.25 of the remaining cloth to make a set of sofa covers. She sold the rest of the cloth at 0.5 of the cost price. How much did she collect from the sale of her cloth?


Pl explain me this

[Jamesbond]

At an ice cream parlour, the owner has a total of 460kg of chocolate and vanilla ice cream. 0.35 of the ice cream are chocolate flavoured. Every 100g of the chocolate ice cream cost $4 while every 100g of the vanilla ice cream costs $6. How much will the owner receive if he sells 1/5 of the chocolate ice cream and 1/2 of the vanilla ice cream?


Pl explain me?

[smartmummy]

Jamesbond:

ksi:

Moderator Note:


Jamesbond, please read the posting rules and please do not start new thread for your math questions.

I am supposed to click the new topic on the left side and click submit right...I did that only...was I wrong?

u have to click post reply.it will continue in this thread.new qn but in the same thread.
if u click new topic it will start a new thread.hope it would help u.

[Champion]

Jamesbond:

ksi:

Moderator Note:


Jamesbond, please read the posting rules and please do not start new thread for your math questions.

I am supposed to click the new topic on the left side and click submit right...I did that only...was I wrong?

No, Jamesbond - each time you have a new Maths question,
First - you go to the relevant thread. In the case all P4 Maths related questions shall be post here Q&A - P4 Math http://www.kiasuparents.com/kiasu/forum/viewtopic.php?f=67&t=25121&start=780

Secondly, click \" postreply\" at the left bottom page and not \"newtopic\". If you click \"newtopic\" you will create new topic and the administrator will need to move all your related questions here

Hope the above is clear to you and I think the next thing for the administrators to do is to move
http://www.kiasuparents.com/kiasu/forum/viewtopic.php?f=67&t=37716 and
http://www.kiasuparents.com/kiasu/forum/viewtopic.php?f=67&t=37715
(questions on Decimals) here lioa

[Jamesbond]

Champion:

Jamesbond:

[quote=\"ksi\"]Moderator Note:


Jamesbond, please read the posting rules and please do not start new thread for your math questions.

I am supposed to click the new topic on the left side and click submit right...I did that only...was I wrong?

No, Jamesbond - each time you have a new Maths question,
First - you go to the relevant thread. In the case all P4 Maths related questions shall be post here Q&A - P4 Math http://www.kiasuparents.com/kiasu/forum/viewtopic.php?f=67&t=25121&start=780

Secondly, click \" postreply\" at the left bottom page and not \"newtopic\". If you click \"newtopic\" you will create new topic and the administrator will need to move all your related questions here

Hope the above is clear to you and I think the next thing for the administrators to do is to move
http://www.kiasuparents.com/kiasu/forum/viewtopic.php?f=67&t=37716 and
http://www.kiasuparents.com/kiasu/forum/viewtopic.php?f=67&t=37715
(questions on Decimals) here lioa [/quote]Thank you champion for guiding me. I was doing the wrong way. :shock:

[Jamesbond]

Jen’s monthly salary is $2340. She spends 0.2 of it on food. 0.05 of it on clothes and 1/4 of it on transport. she then saves the rest. How much money will she save every month?


Pl explain me. Thanks in advance.