P is three times as fast as Q and working together, they can complete a work in 6 days. In how many days can Q alone complete the work?
Choices:
A) 16  B) 77  C) 88  D) 55  E) 8
P = 3Q   P + Q = 3Q + Q = 4Q   These 4Q people can do the work in 6 days, which means Q can do the work in 24 days.   Hence, P can do the work in 8 days.   Answer:8
<result>E</result>
P is three times as fast as Q and working together, they can complete a work in 6 days. In how many days can Q alone complete the work?