A can finish a work in 18 days B can do the same work in 15 days. B worked for 10 days and left the job. In how many days, A alone can finish the remaining work?  Choose the correct answer
A) 5  B) 5 1/2  C) 6  D) 8  E) 9
Explanation:   B's 10 day's work = 1/15 * 10 = 2/3   Remaining work = (1 - 2/3) = 1/3   Now, 1/18 work is done by A in 1 day.   1/3 work is done by A in  (18 * 1/3)= 
<gadget id="calculator"> (18 * 1/3)</gadget>
<output>6</output>
6 days.   ANSWER IS 6
<result>C</result>
A can finish a work in 18 days B can do the same work in 15 days. B worked for 10 days and left the job. In how many days, A alone can finish the remaining work?