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题库 / Prep2007E2-DS-92
X and Y are sets of positive integers. Is the greatest integer in X greater than the greatest integer in Y ?
(1) X is a set of 5 consecutive odd integers, each less than 20.
(2) Y is a set of 3 consecutive even integers, each less than 15.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
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审题！问的是greatest in X和 greatest in Y，是不能通过条件一和条件er确定的
Each statement is giving saperate information about sets X & Y
thus alone they are insuff
Combining we can choose any set
Case 1)
x= {1,3,5,7,9}
Y= { 2,4,6}
thus we have a YES to the question asked ie greatest integer in X greater than the greatest integer in Y
case 2:
x= {1,3,5,7,9}
Y= {10,12,14}
thus we have a NO to the question asked ie greatest integer in X is not greater than the greatest integer in Y
x可以是12345