QR Problem !

[busdent]

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Which of the following choices of pies is logically associated with the worst value for money? (Assume each pie has the same amount of thickness)



A. $2.00 per 6-inch-pie
B. $3.00 per 9-inch-pie
C. $5.00 per 12-inch-pie
D. $8.00 per 15-inch-pie
E. $12.00 per 18-inch-pie


I thought it would be E, but achiever shows A being the right answer. I don't understand how they got there. Thanks

 

[Uracil]

oh I hate that one! soo I didnt even looked at the solution
someone please explain

 

[busdent]

there's like no activity on this board today

 

[Manyak222]

just get the area of each pie. You can see for E, you get ALOT of pie for only 12 bucks. sweet deal!

 

[busdent]

Which of the following choices of pies is logically associated with the worst value for money? (Assume each pie has the same amount of thickness)



A. $2.00 per 6-inch-pie
B. $3.00 per 9-inch-pie
C. $5.00 per 12-inch-pie
D. $8.00 per 15-inch-pie
E. $12.00 per 18-inch-pie


I thought it would be E, but achiever shows A being the right answer. I don't understand how they got there. Thanks

I thought it would just be calculating what would give the least amount of PIE/$...? I still don't get it. sorry manyak

 

[BlueEyes'06]

ahhhhhhhhhhh QR why not just die 🙁.............

 

[Manyak222]

it is.. I just spotted a sweet deal thats all... you can see that for A, you dont get much pie, yet have to pay a good amount of cash. remembering that the radius is squared means that to get the same deal on pie, doubling the radius would mean more than doubling the amount its selling for.

I thought it would just be calculating what would give the least amount of PIE/$...? I still don't get it. sorry manyak

 

[Leh]

Which of the following choices of pies is logically associated with the worst value for money? (Assume each pie has the same amount of thickness)



A. $2.00 per 6-inch-pie
B. $3.00 per 9-inch-pie
C. $5.00 per 12-inch-pie
D. $8.00 per 15-inch-pie
E. $12.00 per 18-inch-pie


I thought it would be E, but achiever shows A being the right answer. I don't understand how they got there. Thanks

so we have to calculate the price per square in...
i counted inches as the diameter
where x= price per square inch
and...when i do them out as such...i get:
[9(3.14)]x= $2.00---------compared these two
[20.25(3.14)]x=$3.00
[36(3.14)]x=$5.00----------compared these two
[56.25(3.14)]x=$8.00
[81(3.14)]x=$12.00

solve for x and the winner is A. at .077 $ per sq inch.

heres a cool trick for specific double digit squaring...some of u mite already know it...
if u have any double digit number that ends in five, square ex: 25^2
do this
25*
25

write down 25 and then cross out one of the two's add one to it and mulitply it by the other two and put it next to the twenty five
3*2= 6 and put the 25 next to it===625
75*75= (8*7)=56 and the twenty five next to it = 5625
sorry to be sooooooooooo confusing.

 

[busdent]

so we have to calculate the price per square in...
i counted inches as the diameter
where x= price per square inch
and...when i do them out as such...i get:
[9(3.14)]x= $2.00---------compared these two
[20.25(3.14)]x=$3.00
[36(3.14)]x=$5.00----------compared these two
[56.25(3.14)]x=$8.00
[81(3.14)]x=$12.00

solve for x and the winner is A. at .077 $ per sq inch.

heres a cool trick for specific double digit squaring...some of u mite already know it...
if u have any double digit number that ends in five, square ex: 25^2
do this
25*
25

write down 25 and then cross out one of the two's add one to it and mulitply it by the other two and put it next to the twenty five
3*2= 6 and put the 25 next to it===625
75*75= (8*7)=56 and the twenty five next to it = 5625
sorry to be sooooooooooo confusing.

Thank you and Manyak

 

[Uracil]

ahhhhhhhhhhh QR why not just die 🙁.............

 

[Indie]

Which of the following choices of pies is logically associated with the worst value for money? (Assume each pie has the same amount of thickness)



A. $2.00 per 6-inch-pie
B. $3.00 per 9-inch-pie
C. $5.00 per 12-inch-pie
D. $8.00 per 15-inch-pie
E. $12.00 per 18-inch-pie


I thought it would be E, but achiever shows A being the right answer. I don't understand how they got there. Thanks

Guys, my answer is very simple, I hope it's right...
A) $1 per 3in
B) $1 per 3 in
c) $1 per 2.4in
D) $1 per 1.87in
E) $1 per 1.5in

I agree with you and think the answer should be E) being the worst value, your only getting 1.5 inches of pizza for a buck... Now if we throw in some toppings then we have to calculate for X... and if it's pepperoni, forget it, now you need a scientific calculator.. lol.. hope thats right and helps..

 

[IdiotsAnnoyMe]

the worst buy HAS to be E! I mean, for real thou...who can eat all that pie? You take a couple bites into it and you're full. That means... there's a LOT of wasted pie when you buy a 12-incher. The extra bucks only lures you into buying more pie, but it's just false!!!!

 

[busdent]

the worst buy HAS to be E! I mean, for real thou...who can eat all that pie? You take a couple bites into it and you're full. That means... there's a LOT of wasted pie when you buy a 12-incher. The extra bucks only lures you into buying more pie, but it's just false!!!!

thanks Indie !

Is that you in that pic?

by the way anybody else agree that E is the right answer?

 

[Uracil]

Hey busdent,
I put E as well for that problem, got it wrong of course...I was like wtf? when I saw it was wrong and didnt even bother looking at the solution.
To me, it makes sense to be E.

 

[busdent]

Hey busdent,
I put E as well for that problem, got it wrong of course...I was like wtf? when I saw it was wrong and didnt even bother looking at the solution.
To me, it makes sense to be E.

What I don't get is why achiever goes into the whole radius thing and squaring it? I just looked it as some apple pie or whatever and calculated how much pie would $1 buy in each of the choices.

 

[legoland]

What I don't get is why achiever goes into the whole radius thing and squaring it? I just looked it as some apple pie or whatever and calculated how much pie would $1 buy in each of the choices.

You have to figure how much $1 would buy each in terms of volume. Not just any linear relation like you did here.

 

[busdent]

You have to figure how much $1 would buy each in terms of volume. Not just any linear relation like you did here.

I guess i kinda get it because of that bigger radius making all the difference