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by JeetGulia » Wed Jul 21, 2010 1:24 pm
In the telephone number 936-215X, what digit does X represent?

(1) Only one digit in the telephone number is greater than X.
(2) X is the greatest of the digits not among the telephone number's first six digits.
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Source: — Data Sufficiency |
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by clock60 » Wed Jul 21, 2010 2:20 pm
if i got the problem properly then my answer is B
(1) only one digit is greater that x,the greatest existing digit is 9 so x must be less the 9 and more that 6, so x can be 7, or 8 insufficient
(2) x is the greatest among non-existing digits, non existing digits are-0,4,7,8,the greatest is 8 so sufficient
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by JeetGulia » Wed Jul 21, 2010 2:53 pm
clock60 wrote:if i got the problem properly then my answer is B
(1) only one digit is greater that x,the greatest existing digit is 9 so x must be less the 9 and more that 6, so x can be 7, or 8 insufficient
(2) x is the greatest among non-existing digits, non existing digits are-0,4,7,8,the greatest is 8 so sufficient
you are right!
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