If the number x is obtained by reversing the order of the digits in the positive 3-digit integer y, is x > y?
(1) The tens digit of y is 3.
(2) The rightmost digit of x is 1 and the rightmost digit of y is 9.
The OA is the option B.
How can I use the statement (2) to get an answer here? Experts, can you clarify this for me? I'd be thankful.
If the number x is obtained by reversing the.....
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If x = 913, then y=319, so x>y is SUFFICIENTVincen wrote:If the number x is obtained by reversing the order of the digits in the positive 3-digit integer y, is x > y?
(1) The tens digit of y is 3.
(2) The rightmost digit of x is 1 and the rightmost digit of y is 9.
The OA is the option B.
How can I use the statement (2) to get an answer here? Experts, can you clarify this for me? I'd be thankful.
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Hi Vincen,
We're told the positive 3-digit number X is obtained by reversing the order of the digits in the positive 3-digit integer Y. We're asked if X is greater than Y. This is a YES/NO question and we can solve it by TESTing VALUES.
1) The tens digit of Y is 3.
IF... Y = 135, then X = 531, then the answer to the question is YES.
IF... Y = 531, then X = 135, then and the answer to the question is NO.
Fact 1 is INSUFFICIENT.
2) The rightmost digit of X is 1 and the rightmost digit of Y is 9.
The information in Fact 2 'locks in' the first and third digits of each number (meaning that X will always be 9 _ 1 and Y will always be 1 _ 9):
IF... Y = 139, then X = 931, then the answer to the question is YES.
This mean that Y will always be in the 100s and X will always be in the 900s, so the answer to the question is ALWAYS YES.
Fact 2 is SUFFICIENT.
Final Answer: B
GMAT assassins aren't born, they're made,
Rich
We're told the positive 3-digit number X is obtained by reversing the order of the digits in the positive 3-digit integer Y. We're asked if X is greater than Y. This is a YES/NO question and we can solve it by TESTing VALUES.
1) The tens digit of Y is 3.
IF... Y = 135, then X = 531, then the answer to the question is YES.
IF... Y = 531, then X = 135, then and the answer to the question is NO.
Fact 1 is INSUFFICIENT.
2) The rightmost digit of X is 1 and the rightmost digit of Y is 9.
The information in Fact 2 'locks in' the first and third digits of each number (meaning that X will always be 9 _ 1 and Y will always be 1 _ 9):
IF... Y = 139, then X = 931, then the answer to the question is YES.
This mean that Y will always be in the 100s and X will always be in the 900s, so the answer to the question is ALWAYS YES.
Fact 2 is SUFFICIENT.
Final Answer: B
GMAT assassins aren't born, they're made,
Rich