Maths Question....
 

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[Closed] Maths Question....

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if you time 33 by 32 how many powers of 3 are there?

can anyone explain this?


 
Posted : 23/05/2010 12:04 pm
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one

33 = 3x11
32 = 2x2x2x2x2
33x32 = 3x11x2x2x2x2x2

power of 3 = 1
power of 11 = 1
power of 2 = 5


 
Posted : 23/05/2010 12:06 pm
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here you go

http://tinyurl.com/2wxxgmw


 
Posted : 23/05/2010 12:11 pm
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one

33 = 3x11
32 = 2x2x2x2x2
33x32 = 3x11x2x2x2x2x2

power of 3 = 1
power of 11 = 1
power of 2 = 5

[img] [/img]


 
Posted : 23/05/2010 12:11 pm
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ahh shucks.


 
Posted : 23/05/2010 12:14 pm
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simple logarithms here

33*32=3^n
log(33*32)=log(3^n)
Log(33*32)=n*log(3)

n= log(33*32)/log(3) = 6.337..

sorted!


 
Posted : 23/05/2010 1:38 pm
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n= log(33*32)/log(3) = 6.337..

forgive me, but doesn't "how [b]many[/b] powers of 3 are there?" imply an integer power and hence the factorisation? Had the question been "to what power would 3 need to be raised to equal this ?" the fractional power would be the right answer. To me, "many" implies a discrete number, and "much" an amount possibly including a fractional part.


 
Posted : 23/05/2010 1:56 pm
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Well if the question itself was open to interpretation it was a bad question. I'm sure the OP will be able to tell which of our answers is the one they need, we did both show working 😛


 
Posted : 23/05/2010 2:02 pm
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Well if the question itself was open to interpretation it was a bad question

question: write a question incapable of misinterpretation


 
Posted : 23/05/2010 3:18 pm
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I've got one, but it's got a naughty word in it.


 
Posted : 23/05/2010 3:50 pm
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Isn't that just being a little pedantic? I only offered a possible solution 🙄


 
Posted : 23/05/2010 4:28 pm
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Isn't that just being a little pedantic?

hmmm, surely when it comes to maths there are only right and wrong answers and a pedantic attention to detail is the default ?


 
Posted : 23/05/2010 4:34 pm
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True enough, however I was pointing out with that comment that you were being pedantic over the semantics of the question, not the maths involved.

But this argument is a little redundant until the OP replies anyway..


 
Posted : 23/05/2010 5:15 pm
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you were being pedantic over the semantics of the question, not the maths involved.

can they be separated ? The question isn't mathematical but the answer is ? In my opinion, you answered a different question.


 
Posted : 24/05/2010 4:56 pm