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Source: — Data Sufficiency |
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by ansumania » Wed Apr 21, 2010 9:50 pm
IMO D
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by tpr-becky » Wed Apr 21, 2010 9:51 pm
the number of integers between r and s not including either one is s-r-1 This is because s-r will give you the number of numbers between including one end point.

1 - statement 1 gives you s-r so it is sufficient

statement 2 also tells you that there are 9 integers between r+1 and s+1 - this is the same as the number of integers between r and s because you added one to each number.

Therefore the answer is D.
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by eaakbari » Thu Apr 22, 2010 1:37 am
Since it is a DS question , you can jump straight to D, as all the info you need is provided
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by Lasve » Thu Jan 12, 2012 3:50 am
I, too, have a problem with this question:
Since is not said that r & s has to be positive, what if the former was <0?

That would mean that would mean that one of the numbers between r & s is 0, that is not an integer. so For example if
s=9
r=-1

s-r= 10
BUT the number of integers would be 8 (1,2,3,4,5,6,7,8)

s=9 & r=-1 Would also comply with the second statement.
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by vinaypat » Tue Mar 27, 2012 3:07 pm
0 is a integer
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