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Value of n

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by fibbonnaci » Mon Feb 01, 2010 6:07 pm
Hey this is a direct one.

4^11-> can be rewritten as 2^22.

so the equation now turns out to be 5^21 * 2^22

What are the factors of 10? 2 and 5. it means to get one 10 we need a combination of one 2 and one 5.

how many such tens can be obtained from the equation? 21- tens.
the other extra two lies without pair.

therefore, n= 21.

Hope this helps!
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by PhDwanaBE » Mon Feb 01, 2010 10:39 pm
What do the symbols * and ^ mean?
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by papgust » Mon Feb 01, 2010 10:56 pm
* - Multiplication

^ - Exponent or Power
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by sanju09 » Mon Feb 01, 2010 11:02 pm
adorendra wrote:(5^21)* (4^11) = 2* 10^n
What is the value of n?
Just 2 is out from (5^21)* (2^22) such that (5^21)* (2^21) = 10^n, needless to say, n = [spoiler]hush...[/spoiler]
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by PhDwanaBE » Wed Feb 03, 2010 12:28 pm
Thanks Papgust!! :-)
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