Tutor MathsGuru: Ask me for your burning Maths questions!

[MathIzzzFun]

wahwah:

Hi,

Need help with the following question, it is not a tough question but I can't get the model right, my model doesn't seem to make sense.
Many thanks in advance.

Maggie had twice as much money as Leslie. After Maggie spent $32 and Leslie spent $18, they have the same amount of money left. How much did each of them have at first?

Hi

the question is flawed - working with the numbers given, Maggie would have $28 and Leslie $14 which indeed doesn't make sense since Leslie has spent more than he had - maybe he had overdraft

To get a sensible answer, the question should either be changed to \"After Maggie spent $42 ... \" or \"After Maggie spent $32 and Leslie spent $14 ...\". I have shown below the model for the latter ...

http://i56.tinypic.com/308bdrl.jpg\">

cheers.

[wahwah]

Hi MathIzzzFun,


My son said that’s some problem with the question, I could not confirm. Thanks for your explanation, will get him to verify with his teacher.

[catddy2002]

Hi,


Pls assist in my son P5 questions:

1. Chester has a number of green, purple and yellow buttons in the ratio 1:3:9. When he had given away 10 purple buttons, 1/6 of the remaining buttons were purple buttons. How many yellow buttons were there in the box?

2. Adam and Raihan had $200 and $500 respectively. After each of them bought the same laptop, they were left with money in the ratio 1:3. How much did the laptop cost.

3. Samuel and Elvis have some marbles. Samuel has 1 1/3 times as many marbles as Elvis. How many marbles do the boys have altogether if Samuel has 48 marbles.

4. The pupils of Primary 5E were asked to wrap some presents for a CIP project. They were given 4 days to complete the project and they planned the following schedule:

1st day: 1/5 of the total number
2nd day: 10 more presents than the 1st day
3rd day: 12 more presents than the 2nd day
4th day: 20 presents
How many presents did the class wrap?

Thanks in advance!

[MathIzzzFun]

catddy2002:

Hi,


Pls assist in my son P5 questions:

1. Chester has a number of green, purple and yellow buttons in the ratio 1:3:9. When he had given away 10 purple buttons, 1/6 of the remaining buttons were purple buttons. How many yellow buttons were there in the box?

2. Adam and Raihan had $200 and $500 respectively. After each of them bought the same laptop, they were left with money in the ratio 1:3. How much did the laptop cost.

3. Samuel and Elvis have some marbles. Samuel has 1 1/3 times as many marbles as Elvis. How many marbles do the boys have altogether if Samuel has 48 marbles.

4. The pupils of Primary 5E were asked to wrap some presents for a CIP project. They were given 4 days to complete the project and they planned the following schedule:

1st day: 1/5 of the total number
2nd day: 10 more presents than the 1st day
3rd day: 12 more presents than the 2nd day
4th day: 20 presents
How many presents did the class wrap?

Thanks in advance!

Hi catddy2002,

hope this helps .. LIFO order

http://i52.tinypic.com/255s5jo.jpg\">

cheers.

[MathIzzzFun]

catddy2002:

Hi,


Pls assist in my son P5 questions:

1. Chester has a number of green, purple and yellow buttons in the ratio 1:3:9. When he had given away 10 purple buttons, 1/6 of the remaining buttons were purple buttons. How many yellow buttons were there in the box?

2. Adam and Raihan had $200 and $500 respectively. After each of them bought the same laptop, they were left with money in the ratio 1:3. How much did the laptop cost.

3. Samuel and Elvis have some marbles. Samuel has 1 1/3 times as many marbles as Elvis. How many marbles do the boys have altogether if Samuel has 48 marbles.

4. The pupils of Primary 5E were asked to wrap some presents for a CIP project. They were given 4 days to complete the project and they planned the following schedule:

1st day: 1/5 of the total number
2nd day: 10 more presents than the 1st day
3rd day: 12 more presents than the 2nd day
4th day: 20 presents
How many presents did the class wrap?

Thanks in advance!

Hi catddy2002

solution for Q3..

http://i51.tinypic.com/2retsv6.jpg\">

cheers.

[MathIzzzFun]

catddy2002:

Hi,


Pls assist in my son P5 questions:

1. Chester has a number of green, purple and yellow buttons in the ratio 1:3:9. When he had given away 10 purple buttons, 1/6 of the remaining buttons were purple buttons. How many yellow buttons were there in the box?

2. Adam and Raihan had $200 and $500 respectively. After each of them bought the same laptop, they were left with money in the ratio 1:3. How much did the laptop cost.

3. Samuel and Elvis have some marbles. Samuel has 1 1/3 times as many marbles as Elvis. How many marbles do the boys have altogether if Samuel has 48 marbles.

4. The pupils of Primary 5E were asked to wrap some presents for a CIP project. They were given 4 days to complete the project and they planned the following schedule:

1st day: 1/5 of the total number
2nd day: 10 more presents than the 1st day
3rd day: 12 more presents than the 2nd day
4th day: 20 presents
How many presents did the class wrap?

Thanks in advance!

Hi catddy2002,

solution for Q2.. very cheap laptop - can make it into Guinness World records !!

http://i52.tinypic.com/2h7otmw.jpg\">

cheers.

[MathIzzzFun]

Hi catddy2002,



for Q1..

http://i54.tinypic.com/204g9v.jpg\">

cheers.

[youngtay]

Hi, please help


Larry planted some mango trees in a row with the same distance apart.
The distance between the first and the fifth tree was 40m.

a) Find the distance between the first and the tenth tree? (Ans:90m)
b) Find the distance between the fifth and the 50th tree? (Ans: 450m)

need help for b) why ans is 450m?

TIA

[corneyAmber]

youngtay:

Hi, please help


Larry planted some mango trees in a row with the same distance apart.
The distance between the first and the fifth tree was 40m.

a) Find the distance between the first and the tenth tree? (Ans:90m)
b) Find the distance between the fifth and the 50th tree? (Ans: 450m)

need help for b) why ans is 450m?

TIA

(a) 10-1 = 9 gaps in between Hence 9x 10 = 90m

(b) 10-5 = 5 gaps in between. Hence 5x10 = 50m
for every 10th-20th, 20th-30th, 30th-40th, 40th-50th trees, they are 10gaps each so 10x10m apart for each, so is 100m x 4 = 400m

Hence you get 400+50 = 450m.


What answer did you get?

[youngtay]

ksi:

youngtay:

Hi, please help


Larry planted some mango trees in a row with the same distance apart.
The distance between the first and the fifth tree was 40m.

a) Find the distance between the first and the tenth tree? (Ans:90m)
b) Find the distance between the fifth and the 50th tree? (Ans: 450m)

need help for b) why ans is 450m?

TIA

(a) 10-1 = 9 gaps in between Hence 9x 10 = 90m

(b) 10-5 = 5 gaps in between. Hence 5x10 = 50m
for every 10th-20th, 20th-30th, 30th-40th, 40th-50th trees, they are 10gaps each so 10x10m apart for each, so is 100m x 4 = 400m

Hence you get 400+50 = 450m.


What answer did you get?

ksi

I got 440m, now i understand.

Thanks.