GMAT Data Sufficiency
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Source: Manhattan
Level: 3
If z is an integer, is 
an odd integer?
1. z is a multiple of 3.
2. z is a multiple of 9.
- 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 statement TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
- D EACH statement ALONE is sufficient.
- E Statements (1) and (2) TOGETHER are NOT sufficient.