GMAT Prep question - please explain

dsuna

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?

jayhawk2001 · Posted: Sat Mar 24, 2007 1:49 pm Post subject:

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