GMAT Question of the Day (May 28): Work Problem and Sentence Correction

Math (PS)

A furniture manufacturer has two machines, but only one can be used at a time. Machine A is utilized during the first shift and Machine B during the second shift, while both work half of the third shift. If Machine A can do the job in 12 days working two shifts and Machine B can do the job in 15 days working two shifts, how many days will it take to do the job with the current work schedule?

(A) 14
(B) 13
(C) 11
(D) 9
(E) 7

OA and Explanation

Verbal (SC)

Like Haydn, Schubert wrote a great deal for the stage, but he is remembered principally for his chamber and concert-hall music.

(A) Like Haydn, Schubert
(B) Like Haydn, Schubert also
(C) As has Haydn, Schubert
(D) As did Haydn, Schubert also
(E) As Haydn did, Schubert also

OA and Explanation