Source: Revised GRE PDF 2nd Ed. Section 5; #2 (p. 75)


In a decimal number, a bar over

In a decimal number, a bar over one or more consecutive digits means that the pattern of digits under the bar repeats without end. For example, 0.387 = 0.387387387 . . . Quantity A = 0.717 Quantity B = 0.71 Quantity A is greater., Quantity B is greater., The two quantities are equal., The relationship cannot be determined from the information given.

2 Explanations


Sarah Ikram

why are we checking the fourth place ?

Apr 22, 2015 • Comment

Jonathan , Magoosh Tutor

Hi Sarah. The numbers look exactly the same until we get to the fourth (ten-thousandth) place. That's the first place where the numbers look different.

When we have a bar, we repeat the entire part under the bar after the last digit show. So

.71 (bar over 71) = .717171717171....and so on: the 71 repeats. We have a 1 for the fourth digit.

.717 (bar over 717) = .717717717717....and so on: the 717 repeats. We have a 7 for the fourth digit. So this quantity is greater.

Hope that helps!

Apr 28, 2015 • Reply


Gravatar Chris Lele, Magoosh Tutor

Sep 27, 2012 • Comment

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