It’s actually a really neat little trick and you’ll see it quite often in questions such as this one:
Here is a quick tip for you, you crazy GMAT Fractions lovers. Seriously, though, GMAT Fractions are a tool that people think they know better than they really do. A bit of brushing up might save you a lot of time and hassle in calculations.
What you might not know, however, is that there is a pattern for such situations:
If you divide by 9, you get 1/9 = 0.111… (the … means repeating because I can’t put a bar over in WordPress).
If you divide by 99, you get 1/99 = 0.010101…
If you divide by 999, you get 1/999 = 0.001001001…
If you divide by 9999, you get 1/9999 = 0.00010001…
For the moment, check out the video below!
(It’s possible to estimate the answer, of course, but it won’t be clean.)
A bar over a sequence of digits in a decimal indicates that the sequence repeats indefinitely.
What is the value of (10^4 – 10^2)(0.0012…)?
How to Read for GMAT Reading Comprehension Here's a simple trugh: You Don’t Read Fast…
Why I'm Not Talking About the 700 GMAT Score Anymore That’s it. I’m fed up…
Does the GMAT Repeat Questions? The Ultimate Guide [latexpage] “The secret is reps, reps, reps.”…
Can You Use a Caclulator on the GMAT ? And Why This Matters The short…
How to Solve GMAT Questions Faster: the Recognition-Execution Loop The GMAT tests pattern recognition under…
How to Detect Baloney in GMAT Critical Reasoning When tackling Critical Reasoning questions on the…