Hi All,
This question can be solved by TESTing VALUES.
We're given a number of Facts to work with:
1) P, Q, S and T are all DISTINCT POSITIVE INTEGERS
2) P and Q are ODD
3) S and T are EVEN
4) The average of the 4 integers is X
We're asked which of the following MUST be TRUE...
Let's TEST....
P = 1
Q = 3
S = 2
T = 6
I. X is an integer
The average of the above 4 integers is 13/4 = 3.25
Roman Numeral 1 is NOT always true
II. (X - 0.5) is an integer
With this X (3.25), 3.25 - .5 = 2.75
Roman Numeral 2 is NOT always true
III. 2X is an ODD integer
With this X (3.25), 2X is 6.5, so it's not even an integer (much less an ODD one).
Roman Numeral 3 is NOT always true
Final Answer:
GMAT assassins aren't born, they're made,
Rich
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