gem:

Hi all, need help for this question.


David took out all the coins in his piggy bank. They were made up of only twenty and fifty-cent coins. There were 12 fifty-cent coins more than twenty-cent coins. The total value of the fifty-cent coins was $21 more than the total value of the twenty cent coins. Find

a) the number of fifty-cent coins in David's piggy bank
b) the total value of the coins David had.

Can anyone help to draw the model for this question and explain your answers. It seems confusing to me.

Thanks.

http://i65.tinypic.com/1mfih.jpg\">

amyliming:

Please someone help me draw model for this :


2/3 of the total pages in gayanthi's notebook was unused.
She used 2/7 of the notebook during first week of school.
What fraction of the total number of pages in the notebook was still unused?

http://i68.tinypic.com/2eoxqir.jpg\">

amk:

Hi,

Pls help. Thanks.
http://i.imgur.com/l6aK5S9.jpg\">
Area of shaded parts
= Area TYZ + Area TWX
= Area TYZ + Area TXY
= Area XYZ
= (20x6)/2
= 60 sq cm

http://i.imgur.com/cEpdDjv.jpg\">
Area of shaded parts
= Area TXW + Area TYZ
= (10x5)/2 + (10x7)/2
= 25 + 35
= 60 sq cm

Polar_bear:

Please help!


In January, Joyce kept 80% of her salary of which she then gave 1/5 to her mother and saved the rest. The rest of her money was spent on food and clothing.In February,she gave her mother $150 more than the amount she had given her in January. The amount given to her mother was then equal to the amount she saved.She spent the same amount on food and clothing in January and February.

Question: What was the percentage increase in the amount Joyce gave to her mother in February?

Answer 1: 80%x1/5=16%; 80%x1/2=40%; 40%-16%=24%; 24%---->$150;

so gave mother in January : 16%---> $100;
gave mother in Feb: 40%----> $250
percentage increase: ($250-$100)/$100x100%=150%
Answer 2: In January: gave her mother 16%; In February, gave her mother 40%
so percentage increase: 40%-16%=24%

Please tell which answer is right? If Answer 1 is right, what kind of question expression may get Answer 2? If Answer 2 is right, what kind of question expression may get Answer 1? :?

\"The amount given to her mother was then equal to the amount she saved.She spent the same amount on food and clothing in January and February.\"
http://i65.tinypic.com/vieccm.jpg\">

amk:

Pls help on this. Thanks.

A farmer had a total of 820 ducks and chickens at first.
He sold 5/9 of the number of ducks and bought another 40 chickens.
The number of ducks he had left after that was 3/4 of the total number of the chickens he had.
How many chickens did the farmer have at first?

http://i68.tinypic.com/14jvm0l.jpg\">

tcgoh:

Please help


Iris and Mary had 154 beads. After Iris gave 27 beads to Mary, Mary hAd 30 more beads than Iris.

a)How many beads does Iris have now?
b)How many beads did Mary have at first?

http://i65.tinypic.com/25ahrbb.jpg\">

chloecube:

hi, need help, this sum seems confusion t me

thks!

ken bought some packet of stamps. there are 8 stamps in each packet. ken was given another 4 more stamps by his brother. and he repacked all the stamps into smaller packet. there are now exactly 6 stamps in each packet and 22 more packet than before. how many stamps did he buy?

Pictorial Representation:
http://i63.tinypic.com/n36yyw.jpg\">

taringal:

Hi,


Please help on this question. Thank you.

Patrick, Devi and Jiamin each have the same number of beads. How many beads must Devi give to Patrick and Jiamin so that Patrick has 20 beads more than Devi and Jiamin has 4 fewer beads than Patrick?

http://i66.tinypic.com/12504ll.jpg\">

Ender:

numeric:

[quote=\"Nickal\"]Hi, is there any other method to solve this question besides guess and check? Tq for the help in advance!


Some books weigh as heavy as some magazines. There are 8 more books than magazines. Each book weighs 300g and each magazine weighs 400g. How many books are there? (56 books?)

http://i67.tinypic.com/xddpok.jpg\">

one set contains 7 books and magazines and not just books.

Base on your method one set contains 4 books, therefore 8 sets contains 32 books.[/quote]Thanks for pointing it out! My careless mistake.
Yep, it should be 32 books.

Here's the correction:
http://i66.tinypic.com/5cevr7.jpg\">

mum2b:

zakashi:

[quote=\"Sniper Angel\"]Hi All,


Maia had 2064 beads than Jenny. After Maia used 144 beads to make a necklace, she had 5 times as many beads as Jenny.

(a) How many more beads did Maia have than Jenny in the end?
(b) How many beads did Maia have at first?

What are the answers?

4u = 2064-144
4u = 1920
u = 480

a) 2064 - 144 = 1920
b) 480 + 2064 = 2544

is it correct?[/quote]Correct