Q&A - P5 Math

[chloecube]

I work out to a)$204 b)240

not sure if correct

[rrjan]

Kindly help me with some questions please.


The number of girls in an international sch is 390 more than 1/3 the enrolment of the international sch. The number of boys in an international sch is 660 more than 1/5 the enrolment of the international sch. How many girls are there in the international sch?

[rrjan]

Please help me with this qn too.


Mrs Ravi was getting some items from an electronics store. First, she bought a tv set with half of her money plus $14. Next she bought a washing machine with half of the remaining money plus $13. After that she bought an oven with half of the money left over plus $12. She ended her shopping spree by buying a rice cooker with half of the money left plus $11. When she arrived home, Mrs Ravi was left with $35. How much money did Mrs Ravi have at first?

[rrjan]

Please help me with this qn too.


Mrs Ravi was getting some items from an electronics store. First, she bought a tv set with half of her money plus $14. Next she bought a washing machine with half of the remaining money plus $13. After that she bought an oven with half of the money left over plus $12. She ended her shopping spree by buying a rice cooker with half of the money left plus $11. When she arrived home, Mrs Ravi was left with $35. How much money did Mrs Ravi have at first?

[poohbeardoremi]

Need help with the following questions please:


1)
There were 588 children in an exhibition in the morning. After 219 girls left and 86 boys entered the exhibition in the afternoon, 2/3 of the total no. of girls was then equal to 1/2 of the total no. of boys. How many girls were there at the exhibition at first?

2)
A florist had the same no. of roses, carnations and tulips in her shop at first. In the afternoon, 58 roses, some carnations and tulips were sold. There were thrice as many carnations as tulips left and the no. of roses left was 25 fewer than the no. of carnations left. There were 108 flowers left in the shop. How many carnations were there at first?

3)
Cartons Y and Z contained some apples. If 20 apples were transferred from carton Y to carton Z, both cartons would have the same no. of apples. If 13 apples were transferred from carton Z to carton Y, carton Y would have 4 times as many apples as carton Z. How many apples were there in carton Y at first?

Thanks in advance.

[MathIzzzFun]

rrjan:

Kindly help me with some questions please.


The number of girls in an international sch is 390 more than 1/3 the enrolment of the international sch. The number of boys in an international sch is 660 more than 1/5 the enrolment of the international sch. How many girls are there in the international sch?

you may want to draw a model as follows:
Girls --> 1/3 of the block + 390
Boys (from the other end) --> 1/5 of the block + 660

1-(1/3+1/5) = 7/15
7/15 of the enrolment --> 390 + 660 = 1050
Total enrolment --> 1050/7 x 15 = 2250

Girls --> 1/3 x 2250 + 390 = 1140

cheers.

[poohbeardoremi]

A big thank you to quekcc! Greatly appreciated.

[MathIzzzFun]

rrjan:

Please help me with this qn too.


Mrs Ravi was getting some items from an electronics store. First, she bought a tv set with half of her money plus $14. Next she bought a washing machine with half of the remaining money plus $13. After that she bought an oven with half of the money left over plus $12. She ended her shopping spree by buying a rice cooker with half of the money left plus $11. When she arrived home, Mrs Ravi was left with $35. How much money did Mrs Ravi have at first?

... similar questions at
- http://www.flickr.com/photos/62167097@N02/7108225881/in/set-72157629537160098

- http://www.flickr.com/photos/62167097@N02/7107925995/in/set-72157629537160098/


Mrs Ravi had $912 at first.

cheers.

[Jamesbond]

Jamesbond:

http://i46.tinypic.com/5a3mms.jpg\">

Pl help me solve (b) & (c).

In such a similar question, if the total number of squares are given and asked to find out how many patterns can be made, how to do this?

[MathIzzzFun]

Jamesbond:

Jamesbond:

http://i46.tinypic.com/5a3mms.jpg\">

Pl help me solve (b) & (c).

In such a similar question, if the total number of squares are given and asked to find out how many patterns can be made, how to do this?

Total number of squares is a square number --> 1x1, 2x2, 3x3 ...

Pattern 1 --> 4 = 2 x 2
Pattern 2 --> 9 = 3 x 3
Pattern 3 --> 16 = 4 x 4

So, given total number of squares in a pattern --> take the square root, and the pattern number = square root - 1.

cheers.