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GMAT Prep question - please explain

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dsuna Just gettin' started! Default Avatar
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GMAT Prep question - please explain Post Sat Mar 24, 2007 12:01 pm
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  • Lap #[LAPCOUNT] ([LAPTIME])
    Is the hundredths digit of the decimal d greater than 5?

    1. The tenths digit of 10d is 7
    2. The thousandths digit of d/10 is 7

    Ans. D

    Please confirm if my logic is right.

    Let's say the number is abc.Xde
    They are asking if X>5

    1. 10d = 10*abc.Xde = abcX.de - where d=7 - nothing about X
    2. d/10 = abc.Xde/10 = ab,cXde - where c=7 - again nothing about X

    The answer is D - each statement Alone is sufficient, because you answer NO to each statement? I mean NO, 7 is not the tenths digit and No, 7 is not the thousandths?

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    jayhawk2001 Community Manager
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    Post Sat Mar 24, 2007 1:49 pm
    The hundredths place is the second digit following the decimal point.
    So, in your abc.Xde example, X is tenths place and d is hundredths
    place

    1 and 2 both give you 7 for the hundredths place. Hence D

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