Q&A - P5 Math

[blueymum]

Thanks once again.


May I know how did u derive 15 units?

For the second question, I was able to solve with model but when I used the branching method, I could not. Would u be able to do it via that method?

Thanks!!

4/4 -- 1/4 shoes
-- 3/4 remainder -- 1/6
-- 5/6 5/6x3/4= 15/24

15u --> 125?

[MathIzzzFun]

blueymum:

Thanks once again.


May I know how did u derive 15 units?

For the second question, I was able to solve with model but when I used the branching method, I could not. Would u be able to do it via that method?

Thanks!!

4/4 -- 1/4 shoes
-- 3/4 remainder -- 1/6
-- 5/6 5/6x3/4= 15/24

15u --> 125?

Hi

2/5 of flour in 6 days --> 6/15 of flour in 6 days

For Q2...

15/24 of money ---> $ 125
Total amount of money --> $ 125 / 15 x 24 = $ 200

cheers.

[yxl]

Q1)Kenny bought two bags of rice, X and Y. The two bags contained diferent

amounts of rice which had a total mass of 90kg. Kenny poured 1/4 of the
rice from Bag X into Bag Y. After that, he poured 2/5 of the rice from
Bag Y into Bag x. He found that both bags had the same mass now.
How much rice was ther in Bag y at the beginning?


Q2) Marcus earns $350 less than Terry every month. They each spend $800
every month and save the rest of their money.

a) How long does it take for marcus to save $2100 and for Terry to save
$4550.

b) What is Marcus’s monthly salary?

[YumYum]

Hi, need help with this Qn:


This year, Inez, is 4 times as old as her son.

In 15 years’ time, Inez’s age will be 3 years more than twice her son’s age.

How old was Inez 8 years ago?

Thanks.

[Raider]

http://i44.tinypic.com/zusciw.jpg\">

[YumYum]

Raider, thank you!

[nhps2012]

Can somebody help me:


Jewel bought some pens and wanted to put them into boxes. If she put 4 pens into each box, there would be 3 pens left. If she put 6 pens into each box, she would have 5 pens left.

If the number of pens was between 100 and 150, how many pens did Jewel buy?

Thank you!

[MathIzzzFun]

nhps2012:

Can somebody help me:


Jewel bought some pens and wanted to put them into boxes. If she put 4 pens into each box, there would be 3 pens left. If she put 6 pens into each box, she would have 5 pens left.

If the number of pens was between 100 and 150, how many pens did Jewel buy?

Thank you!

hi

find number = multiple of 12 minus 1 in the range of 100-150.
4 possible answers - 107, 119, 131, 143

cheers.

[nhps2012]

MathIzzzFun:

nhps2012:

Can somebody help me:


Jewel bought some pens and wanted to put them into boxes. If she put 4 pens into each box, there would be 3 pens left. If she put 6 pens into each box, she would have 5 pens left.

If the number of pens was between 100 and 150, how many pens did Jewel buy?

Thank you!

hi

find number = multiple of 12 minus 1 in the range of 100-150.
3 possible answers - 119, 131, 143

cheers.

Hi MathIzzzFun

Thank you very much for your help.

Your answer is the same as mine. 4 possible answers 107, 119, 131, 143.

The problem I had is how do I present the solution.

Once again, thank you very much for your help.

[MathIzzzFun]

nhps2012:

MathIzzzFun:

[quote=\"nhps2012\"]Can somebody help me:


Jewel bought some pens and wanted to put them into boxes. If she put 4 pens into each box, there would be 3 pens left. If she put 6 pens into each box, she would have 5 pens left.

If the number of pens was between 100 and 150, how many pens did Jewel buy?

Thank you!

Hi MathIzzzFun

Thank you very much for your help.

Your answer is the same as mine. 4 possible answers 107, 119, 131, 143.

The problem I had is how do I present the solution.

Once again, thank you very much for your help.

[/quote]hi

Oops..morning blues..computed for range 110-150.
For such questions, the usual method is to list which will be tedious for this question.
Looking at the remainder, we have:
Divide by 4--> remainder 3
Divide by 6 --> remainder 5
So, adding 1 to the number will make it divisible by 4 & 6, so find multiples of 4 & 6 in the given range and subtract 1 to get the number.


cheers.