Maths Problems Please help..

[thewantedguy]

I have some questions..if someone can help i will be really grateful
Q1 Eight tins of dog food are enough to feed 3 dogs for 2 days. For how long does 12 tins of dog food feed 10 dogs?
Q2 Numbers given are 2,3,4,8,64,71,91. Find six numbers a,b,c,d,e,f from the list such that a(b+c)=d(e+f)
Q3(a) A dealer sold a camera for $184. She made a profit of 15%. Calculate the cost price of the camera.
(b) She sold an identical camera to a staff member at a discount of x% and she still made a profit of not less than 10%
Calculate the greatest value of x correct to one decimal place.

In Q3 (a) part is very easy but i did not get the second part. Please help Thanks in advance

 

[ibadsiddiqi]

these type of questions dont come in the cie exams. Where did you get these from??

 

[abcde]

AoA!
Is the answer to question1 0.9 days? And is the answer to Q3 (b) 4.5% ?

 

[falcon678]

Q3a) is super easy..... ans is $156.40
Q1 n Q3b) is rite by abcde
as far as Q2 is concerned never did this type of question......

 

[abcde]

The way I solved it, I'm getting a cost price of $160 in question 3 (a). What's the correct answer, thewantedguy?

 

[thewantedguy]

Its $156.40..n your other ans are correct too..Q2 was the toughest and it came in one of the school's mock papers..had no idea about it so asked u people..

 

[thewantedguy]

And can anyone of you explain me Q1?

 

[abcde]

I solved question 3 (a)like this:
Let the cost price be $x.
Profit = $(184 - x)
Profit = 15% x = 0.15x
=> 0.15 x = 184 - x
=> 1.15 x = 184
=> x = 184/1.15
=> x = $160. So the cost price is $160. Where am I wrong? How is the cost price $156.40 ? =S

 

[falcon678]

I solved question 3 (a)like this:
Let the cost price be $x.
Profit = $(184 - x)
Profit = 15% x = 0.15x
=> 0.15 x = 184 - x
=> 1.15 x = 184
=> x = 184/1.15
=> x = $160. So the cost price is $160. Where am I wrong? How is the cost price $156.40 ? =S

yara u r making it complicated!
its simple.....just take 15% of 184...it will be 27.60
then subtract it frm 184 which will give u the ans of 156.40

 

[abcde]

Hope this is useful.

 

[abcde]

I solved question 3 (a)like this:
Let the cost price be $x.
Profit = $(184 - x)
Profit = 15% x = 0.15x
=> 0.15 x = 184 - x
=> 1.15 x = 184
=> x = 184/1.15
=> x = $160. So the cost price is $160. Where am I wrong? How is the cost price $156.40 ? =S

yara u r making it complicated!
its simple.....just take 15% of 184...it will be 27.60
then subtract it frm 184 which will give u the ans of 156.40

When they say "She made a profit of 15%", it implies that the profit is expressed as percentage of the cost price, not the selling price as you have taken. I still think $160 would be the correct cost price unless the question specifically mentions that the profit is expressed as a percentage of the selling price.

 

[ibadsiddiqi]

these type of questions donot come in CIE. THe questions that come are normally straight forward. These questions are sort of critical thinking questions