Each week Manhattan GMAT posts a GMAT question on our blog and follows up with the answer the next day. Are you up for the challenge?
If xy ≠ 0, is x an integer?
1) xy is an integer.
2) y is a prime number with y unique factors.
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 to answer the question asked, and additional data are needed.