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Author Topic: Riddles  (Read 15515 times)

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Offline valadaar

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Re: Riddles
« Reply #25 on: June 20, 2008, 01:24:56 PM »
And if the 2x2x2 box has a lid on it. 

Is "foot" the unit of measurement or the type of box :P

   
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Offline Murometz

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Re: Riddles
« Reply #26 on: June 20, 2008, 08:16:04 PM »
Question #3.

(Thanks Pariah, Scras, and val for participating!  :D)

Citizens of Canada pay as much income tax (percentage-wise) as they make dollars per week. What is the optimal salary in Canada?
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Offline Pariah

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Re: Riddles
« Reply #27 on: June 20, 2008, 11:01:27 PM »
Gold Dubloons
For the love of meat, shut up! No one wants to hear your emo character background! My hands are literally melting away, and I'm complaining less than you!
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Offline Murometz

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Re: Riddles
« Reply #28 on: October 30, 2014, 10:29:20 PM »
lol
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Offline Chaosmark

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Re: Riddles
« Reply #29 on: October 31, 2014, 12:19:57 AM »
Question #3.

(Thanks Pariah, Scras, and val for participating!  :D)

Citizens of Canada pay as much income tax (percentage-wise) as they make dollars per week. What is the optimal salary in Canada?

$50/week.

This can be determined by plotting the function and finding its maximum. (We could also do calculus if we didn't want to deal with it visually, but graphing was easier.)

Our function is: income = salary - (salary * percentage), where percentage = salary/100

The following is a graph of that function: http://tinyurl.com/nvpj6jv

As you can see, the plot is maximized at 50. Ergo, our optimum salary is $50.

Edit: Wow, that link got mangled.
« Last Edit: October 31, 2014, 12:36:17 AM by Chaosmark »
P(A|B) = P(B|A)*P(A)/P(B)

By the power of Bayes!

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Offline Chaosmark

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Re: Riddles
« Reply #30 on: October 31, 2014, 12:33:47 AM »
Not quite a riddle.

If you can answer this correctly, you are only 9 more right answers away from getting a position as a Quantitative Modeler/Analyst, with a prestigious electronic brokerage firm, for a tidy rate of $125/hour.

A brick weighs a pound plus 1/2 a brick. How much does the brick weigh?


The correct answer will force me to post Question #2 (of 9)

Having not looked at the thread for answers, the answer to this is 2 pounds. x = 1 + .5x, solve for x -> x = 2

Question #2 on Quant Analyst test

2. Could a stack of pennies as high as the C.N. Tower fit into a 2x2x2 foot box? (A penny has a radius of 3/8 inch, and the C.N. Tower is 1900 feet high)

a correct answer post will lead to Question #3

This is comparing volumes.

The stack of pennies is, ideally, a cylinder. We know that volume it's volume is area * height, which means V = h*pi*r^2. With a radius of 3/8ths of an inch, that gives us V = 1900*pi*(0.03125ft^2) = 5.82912699397 ft^3
The box is 2x2x2, which gives us a volume of 2^3 = 8 ft^3

Thus, we can conclude that yes, the stack of pennies will fit inside the specified box.
P(A|B) = P(B|A)*P(A)/P(B)

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Offline Murometz

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Re: Riddles
« Reply #31 on: October 31, 2014, 09:10:32 AM »
Wow, Cmark, weren't you supposed to be drinking last night? :P

I may have to find that test again to see if you can...GO ALL THE WAY!!!!
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Offline Chaosmark

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Re: Riddles
« Reply #32 on: October 31, 2014, 09:33:37 AM »
Wow, Cmark, weren't you supposed to be drinking last night? :P

I may have to find that test again to see if you can...GO ALL THE WAY!!!!

I didn't get hammered, alas. But apparently a drink or two makes my brain quite effective at math. Yay. Got any math-utilizing jobs that don't mind if you drink? :P
P(A|B) = P(B|A)*P(A)/P(B)

By the power of Bayes!

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Offline valadaar

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Re: Riddles
« Reply #33 on: October 31, 2014, 10:58:00 AM »
Note: your volume only is accurate if the pennies are melted/powdered prior to being packed in the box.  Considering the effective volume of the penny as a box, you have roughly 20% greater volume (4/pi) that still fits within the 8 square feet of the box. 

   
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Offline Scrasamax

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Re: Riddles
« Reply #34 on: October 31, 2014, 11:14:30 AM »
The pennies fit very easily in the box if you take them to a CoinStar machine, and then just bring the credit voucher, it's about the size of a typical shopping receipt.
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Offline eldarbeast

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Re: Riddles
« Reply #35 on: December 31, 2014, 01:21:24 PM »
Where are the rest of the 9 riddles?

Inquiring minds...

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