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GMAT Problem Solving (PS) | Re: Which of the following is closest to (1)/(1.001)?

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Cez005 wrote:

Which of the following is closest to (1)/(1.001)?

A. 0.997
B. 0.998
C. 0.999
D. 1.000
E. 1.001

This question has been posted previously; however, the thread is short and discontinued. I'm looking for a clear approach for solving this type of problem besides back-solving. Thanks!


Back solving seems the best way. Since you can eliminate D and E from the get go start with C. Back-solving should be easy because multiplications are with 1.

Another approach could be a little bit of factoring:


1/1.001
...

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