Q&A - PSLE Math

[Tang]

firebird:

1) Melvin, Thomas and Jack put some coins in a piggy bank. They wanted to donate some money to the charity, so Thomas and Jack took out 795 coins. Melvin and Thomas took out 5/13 of the coins from their piggy bank. Jack and Melvin took out 4/5 of the coins from their piggy bank. How many more coins did Thomas take than Melvin?

T + J --> 795 coins

M + T --> 5/13 = 25/65

M + J --> 4/5 = 52/65

2 M + T + J --> 25/65 + 52/65 = 77/65

1 M --> 77/65 - 65/65 = 12/65 (since M + T + J = 1 = 65/65)

2 M --> 12/65 x 2 = 24/65

T --> 25/65 - 12/65 = 13/65

T - M --> 13/65 - 12/65 = 1/65

T + J --> 77/65 - 24/65 = 53/65

53 u --> 795 coins

1 u --> 795/53 = 15 coins

Thomas took 15 more coins than Melvin.

[liketoeat]

[/quote]


Anytime! (BTW, your moniker makes me hungry! :))[/quote]


yours too, muffins, yumyum

[Muffins]

liketoeat:

Muffins:

Anytime! (BTW, your moniker makes me hungry! :))

yours too, muffins, yumyum

You'd be the perfect host of the \"How to cook nice meals\" thing in \"Foodies Paradise\"!

[Tang]

Muffins:

liketoeat:

[quote=\"Muffins\"]
Anytime! (BTW, your moniker makes me hungry! :))

yours too, muffins, yumyum

You'd be the perfect host of the \"How to cook nice meals\" thing in \"Foodies Paradise\"! :)[/quote]
Hello,

I got 'A1' for Home Economics. I love to cook. I also like to eat. I need to watch my weight closely.

[corneyAmber]

Tang:

Hello,

I got 'A1' for Home Economics. I love to cook. I also like to eat. I need to watch my weight closely.

Tang is boy or girl??

[abc_parent]

Hi gurus


I remember posting but cannot locate my post anymore.
I just cannot recall where I post them.

So I am re-posting. Hope you all don’t mind.


Q14) If Ahmad and Ben work together, they can complete a job in 12 days. If Ahmad and Ben worked together for 3 days, followed by Ben who worked alone for the next 5 days, they can finish 5/12 of the job. How many days will each of them need to complete the job if they were to work alone?

Given answers:
Ahmad = 20days
Ben = 30days


Q15) Tommy and Wilson jog on a hexagon track (6 equal sides) at 8am. Tommy starts at point C while Wilson starts at point F. Both jog in the direction as shown by the arrows. Tommy’s speed is 1.5 times Wilson’s.
(a) At which point will they meet?
(b) If they meet at 8.20am ,find Tommy’s speed?

[Vanilla Cake]

abc_parent:

Q14) If Ahmad and Ben work together, they can complete a job in 12 days. If Ahmad and Ben worked together for 3 days, followed by Ben who worked alone for the next 5 days, they can finish 5/12 of the job. How many days will each of them need to complete the job if they were to work alone?

See http://www.kiasuparents.com/kiasu/forum/viewtopic.php?t=280&postdays=0&postorder=asc&start=1380, Dharma's solution dated 20 Jun 2010 08:42 and Uncle Tianzhu's solution dated 20 Jun 2010 09:25

abc_parent:

Q15) Tommy and Wilson jog on a hexagon track (6 equal sides) at 8am. Tommy starts at point C while Wilson starts at point F. Both jog in the direction as shown by the arrows. Tommy's speed is 1.5 times Wilson's.
(a) At which point will they meet?
(b) If they meet at 8.20am ,find Tommy's speed?

See http://www.kiasuparents.com/kiasu/forum/viewtopic.php?p=178599#178599 dated 06 May 2010 22:51 and CoffeeCat's solution dated 06 May 2010 23:00

[abc_parent]

Thanks to ksi , Dharma , Uncle Tianzhu, VanillaCake & CoffeeCat!!!

[hamsterss]

Hello everyone


I have a question to ask.

Do we need to write word statement when doing maths paper 2? If we didn't,will we lose marks because of this?

PS. I don't know where to post this,so i make a new topic.

Thanks you!

[buds]

Please share the level of the child P1 to P6 and

we can move the post accordingly, hamsterss..
Topics beginning with \"Need Help\" especially are
frankly too vague to be a subject header..

We have many discussions here which may be
relevant to you and the answers you're seeking
in here. Click the blue link to go right there. Hope
this helps. > http://www.kiasuparents.com/kiasu/forum/viewforum.php?f=27