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If x and y are integers between 10 and 99, inclusive, is

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If x and y are integers between 10 and 99, inclusive, is [#permalink] New post 10 Feb 2006, 15:25
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If x and y are integers between 10 and 99, inclusive, is (x-y)/9 an integer?
(1) x and y have the same two digits, but in reverse order.
(2) The tens’ digit of x is 2 more than the units digit, and the tens digit of y is 2 less than the units digit.
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 [#permalink] New post 10 Feb 2006, 16:02
A.

(x-y)/9 = integer ?

that means is (x-y) = 9, 18, 27..........99

Stat 1 sufficient for example x= 34, y=43 or vice versa

Stat 2 is not sufficient to answer the question for example if X =20
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 [#permalink] New post 10 Feb 2006, 23:17
yep the answer is A

(x-y)/9 = 9 , 18 , 27 multiples of 9 .

and wht ever btw 10 and 90 is consider the difference will be a multiple of 9
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  [#permalink] 10 Feb 2006, 23:17
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