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The 9 squares above are to be filled with x’s and o’s, with only one symbol in each square. How many of the squares will contain an x ?
1. More than 
of the number of squares will contain an o.
2. Each of the 4 corner squares will contain an x.
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
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文字解析
Arithmetic
1. If more than 
of the squares will contain an o, then 5, 6, 7, 8, or 9 of the squares will contain an o. The rest will contain x’s, and so 4, 3, 2, 1, or 0 of the squares will contain an x; NOT sufficient.
2. Since each of the 4 corner squares will contain an x, the number of squares that will contain an x could be 4, 5, 6, 7, 8, or 9; NOT sufficient.
Taking (1) and (2) together, from (1), the number of squares containing x’s will be 4, 3, 2, 1,
or 0, while from (2), the number of squares containing x’s will be 4, 5, 6, 7, 8, or 9. Therefore, the number of squares containing x’s will be 4.
The correct answer is C;
both statements together are sufficient.
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