A can finish a piece of work in 4 days. B can do it in 8 days. They work together for two days and then A goes away. In how many days will B finish the work?
Pick one
A) 4
B) 5
C) 6
D) 2
E) 8

Rationale: "2 / 4 + ( 2 + x ) / 8 = 1 = > x = 2 days answer : d"
Answer: D