GmatPrep7

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by beatthegmatinsept » Wed Sep 22, 2010 8:20 am
(10^8 - 10 ^ 2) / (10^7 - 10^3)
Taking common factors in both numberator and denominator,
Numerator: 10^2(10^6 - 1)
Denominator: 10^3(10^4 - 1)
Cancelling out the factors, you get:
10^-1(10^6)/(10^4) = (10^-1)(10^2) = 10^1 = 10.
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