Q&A - P3 Math

[just888]

just888:

[quote]sorry. The question is incomplete. Glee! Hit the wrong button.


Can someone pls help with this number pattern question?

1st row: 3, 9, 7, 7
2nd row: 4, 16, 13, 26
3rd row: 5, 25, 21, ?

Thanks;)

there do not seems to have a relation with the 2nd and the 3rd no in each row. Thought in sequence all the numbers in the row are related.[/quote]1st row: 3, x3 9 , -2 7, x1 7
2nd row: 4, x4 16, -3 13, x2 26
3rd row: 5, x5 25, -4 21, x3 63

[just888]

24hr-mum:

how to do this?


Lily has red, yellow and blue marbles. 18 were blue. Half of the marbles were yellow, and 1/3 of them were red. how many marbles does she have in total?
lily later gave some red marbles away and was left with equal number of red and blue marbles. how many red marbles did she give away?

No of blue marbles = 1 - 1/2 - 1/3
= 6/6 - 3/6 - 2/6
= 1/6

if 1/6 is 18 marbles
then 6/6 is (18 x 6 ) = 108

Total = 108 marbles

1/3 of red is (18 x 2 ) = 36
Therefore need to give away 36-18 = 18 red marbles

[Andaiz]

rrjan:

String P is 8 cm longer than String Q. The total length of String P and String R is 54cm. Find the length of String Q.

Sincere Thanks

rrjan, believe the second sentence should read \"The total length of String P and Q is 54cm.\" here's my take

P |_____|_8_| }

Q |_____| } 54


54 - 8 = 46
Q = 46/2 = 23 cm.

[24hr-mum]

there are 5 times as many local stamps as there are foreign stamps.

which one is the 5 times and which is the 1 times? foreign or local stamps?

[Andaiz]

24hr-mum:

there are 5 times as many local stamps as there are foreign stamps.

which one is the 5 times and which is the 1 times? foreign or local stamps?

The 5x local stamps and the 1x is foreign.

[24hr-mum]

i thought ‘as many local stamps’ means u r using the local stamps as the base for comparison, so the local is 1x and the foreign is 5x?? i m a bit confused…

[Muffins]

24hr-mum:

i thought 'as many local stamps' means u r using the local stamps as the base for comparison, so the local is 1x and the foreign is 5x?? i m a bit confused..

Hi 24 hour mum, although it may look that way, it actually isn't.

Take an example - If A had 5 $1 coins, and B had 1 $1 coin, then A would have 5 times as many $1 coins as B.

Hope that helped

[24hr-mum]

another question:

John has 24 sweets more than Mary.
How many sweets must John give Mary so that Mary will have 12 sweets more than John?

how to draw the model?

[Sun_2010]

24hr-mum:

another question:

John has 24 sweets more than Mary.
How many sweets must John give Mary so that Mary will have 12 sweets more than John?

how to draw the model?

The excess that John has should be divided equally between him and Mary.

So john must give 24/2 = 12 sweets to mary.

http://i54.tinypic.com/11u94sg.jpg\">

My bad, More careless than my Children

sorry 24 hr mum, will redo model

[Sun_2010]

http://i54.tinypic.com/29kumpw.jpg\">

WCW:

Sun_2010:

[quote=\"24hr-mum\"]another question:

John has 24 sweets more than Mary.
How many sweets must John give Mary so that Mary will have 12 sweets more than John?

how to draw the model?

The excess that John has should be divided equally between him and Mary.

So john must give 24/2 = 12 sweets to mary.

http://i54.tinypic.com/11u94sg.jpg\">

Sun, this will make them to have same amount of sweets :)[/quote]
Yeah, sorry more careless than my kids :slapshead:

Here is the revised model

http://i54.tinypic.com/29kumpw.jpg\">

John should first give 12 sweets to Mary, then divide the excess equally.

So 24 - 12= 12
12 /2 = 6

so john should give 12+6 = 18