Tutor MathsGuru: Ask me for your burning Maths questions!

[Yu Xuan]

rain29:

Hi Yu Xuan,


Thanks for your help. Now I can understand better with your explanation. Finally can explain to my daughter.

The pleasure is mine. Nice evening!

[Dharma]

is_me_lblue:

Hi,


Pls assist below question. The answer given in the answer sheet is 16r but I feel a bit not right (hope I am wrong).

\"Leroy had only $9 and he needed to buy 85 magnets. His father gave him another $r. The magnets were sold in pack of 5 for $r. How much more money did he need to pay for all the 85 magnets ?\"

I need to explain to my son but I wonder what happen to the $9 if the answer is 16r.

Thnks

Additional amt needed to buy all 85 magnets
= $(85/5 x r) - $(9 + r)
= $(17r - 9 - r)
= $(16r - 9)

Think the given answer is incorrect

[is_me_lblue]

Dharma:

is_me_lblue:

Hi,


Pls assist below question. The answer given in the answer sheet is 16r but I feel a bit not right (hope I am wrong).

\"Leroy had only $9 and he needed to buy 85 magnets. His father gave him another $r. The magnets were sold in pack of 5 for $r. How much more money did he need to pay for all the 85 magnets ?\"

I need to explain to my son but I wonder what happen to the $9 if the answer is 16r.

Thnks

Additional amt needed to buy all 85 magnets
= $(85/5 x r) - $(9 + r)
= $(17r - 9 - r)
= $(16r - 9)

Think the given answer is incorrect

Thank you very much. Finally I can explain to my son with the correct answer.

[kwcllf]

Please help with the following question:


Amanda has 3 times as much money as Jolie. Colonel has $27 more than Amanda. The amount of money Jolie has is $1274 less than 5 times the amount of money Amanda has. Find the amount of money Jolie and Colonel have altogether.

Thanks!

[Dharma]

kwcllf:

Please help with the following question:


Amanda has 3 times as much money as Jolie. Colonel has $27 more than Amanda. The amount of money Jolie has is $1274 less than 5 times the amount of money Amanda has. Find the amount of money Jolie and Colonel have altogether.

Thanks!

Amanda : 3u
Jolie : 1u
Colonel : 3u + $27

1u = 5(3u) - $1274
14u = $1274
1u = $91

Amt of money Jolie & Colonel have altogether
= 4u + $27
= 4($91) + $27
= $391

[kwcllf]

Hi Dharma,


Thanks so much…really appreciate the help.

[tisha]

Dharma:

1u = $91


Amt of money Jolie & Colonel have altogether
= 4u + $27
= 4($91) + $27
= $455

Isn't 4 x 91 +27 = 391 ?

[Dharma]

tisha:

Dharma:

1u = $91


Amt of money Jolie & Colonel have altogether
= 4u + $27
= 4($91) + $27
= $455

Isn't 4 x 91 +27 = 391 ?

Silly me ...thanks Tisha

[SaPan]

Dear uncles/aunties,


pls help me with this question.

At first, Kumar has only $5 notes and Devi had only $2 notes.
The number of notes Kumar had is 2/3 of Devi’s notes.
When Devi gave Kumar $80, he changed all the $80 to $5 notes.
Then the number of notes Devi has now is 1/10 more than Kumar.
How many notes does Devi have at the end?

[iFruit]

SaPan:

Dear uncles/aunties,


pls help me with this question.

At first, Kumar has only $5 notes and Devi had only $2 notes.
The number of notes Kumar had is 2/3 of Devi's notes.
When Devi gave Kumar $80, he changed all the $80 to $5 notes.
Then the number of notes Devi has now is 1/10 more than Kumar.
How many notes does Devi have at the end?

At first assume Kumar has = 2n notes
Then Devi has = 3n notes

$80 = $2 x 40 = $5 x 16. So Devi lost 40 notes and kumar gained 16 notes

so new ratio = 3n-40: 2n+16 = 11:10

10(3n-40) = 11(2n+16)----> 30n -400 = 22n + 176 ---> 8n = 576-->n = 72

So Devi at the end = 3n-40 = 72x3 - 40 = 176

HTH.