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Value question about powers !

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Junior | Next Rank: 30 Posts
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by Gdieterling » Thu Aug 13, 2009 4:35 am
Hey, me again !

This was the first quant question I got on the Gmat Prep Test 1, and got it wrong !

(1/5)^m * (1/4)^18 = 1/2(10)^35 , m = ?

A - 17
B - 18
C - 34
D - 35
E - 36


OA : D - 35

Can't figure out why ... Do you find it easy for a power question ?
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Master | Next Rank: 500 Posts
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by truplayer256 » Thu Aug 13, 2009 5:56 am
(1/5)^m * (1/4)^18 = 1/2(10)^35

1/5^m*1/4^18=1/2(2*5)^(35)

1/5^m*1/2^36=1/2^36*5^35

1/5^m*2^36=1/2^36*5^35

Match both sides of the equation.


m=35
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Junior | Next Rank: 30 Posts
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by Gdieterling » Thu Aug 13, 2009 6:10 am
Thank you :)
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