GMAT数学题If Q is an integer between 10 and 100,what is the val
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GMAT数学题
If Q is an integer between 10 and 100,what is the value of
(1)one of Q's digits is 3 more than the other,and the sum of its digits is 9
(2)Q
If Q is an integer between 10 and 100,what is the value of
(1)one of Q's digits is 3 more than the other,and the sum of its digits is 9
(2)Q
the answer is C.
let's say Q=xy or yx.From (1) we know that x=y+3 or y=x+3,and x+y=9.Hence value of Q could be 36 or 63.So (1) is insufficient.From (2) we know that Q
let's say Q=xy or yx.From (1) we know that x=y+3 or y=x+3,and x+y=9.Hence value of Q could be 36 or 63.So (1) is insufficient.From (2) we know that Q
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