Section: Mathematics

15) If a and b are positive integers, is a + 4b odd?

1) b is even.

2) a is odd.

if statement (1) ALONE is sufficient, but statement (2) alone is not sufficient to answer the question.
if statement (2) ALONE is sufficient, but statement (1) alone is not sufficient to answer the question.
if BOTH statements (1) and (2) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient.
if EACH statement ALONE is sufficient to answer the question asked.
if statements (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed.