1.  Two sisters can complete a job in 6 hours, when working together at their respective constant rates. The elder sister alone can complete the job in 8 hours, in how many hours can the younger sister complete the job alone? 
a.   12 hrs 
b.   24 hrs 
c.   48 hrs 
d.   10 hrs


2.  Anita can do a piece of work in 15 days and Sunita takes 12 days. But if they take the help of Kavita, they can finish their job in 5 days. Find in how many days Kavita alone can finish the job? 
a.   20 days 
b.   10 days 
c.   12 days 
d.   18 days


3.  Husband can finish a piece of work in 8 days while his wife can finish the same piece of work in 16 days. Find in how many days both of them can finish the work, while working together. 
a.   5 days 
b.   5.3 days 
c.   5.5 days 
d.   6 days


4.  Ketty and Betty together take 12 days to complete a piece of work. Ketty alone can finish the work in 18 days. How long would Betty take to finish the same work? 
a.   28 days 
b.   20 days 
c.   30 days 
d.   36 days


5.  15 men or 18 women can complete a piece of work in 12 days. Calculate the number of days 5 men and 10 women would take to complete the work ? 
a.   11 days 
b.   20/3 days 
c.   10 days 
d.   27/2 days


6.  X takes thrice as much time as Y to sweep the floor and Z takes the same time as the time taken by X and Y, working together. When all three work together, they finish sweeping in 9 hours. Find the time taken by each of them to finish sweeping. 
a.   X = 72 hours, Y = 24 hours, Z = 18 hours 
b.   X = 24 hours, Y = 72 hours, Z = 18 hours 
c.   X = 18 hours, Y = 24 hours, Z = 72 hours 
d.   None of the above


7.  Nick and Jose can finish fencing a garden in 15 days, while Nick, Jose and Rose take 10 days to finish. Find the time in which Rose alone can finish the fencing. 
a.   25 days 
b.   20 days 
c.   30 days 
d.   28 days


8.  Bobby can complete a work in 15 days. Rocky is 50% more efficient than Bobby and Rick is 20% more efficient than Rocky. If all of them work together, how long would they take to finish the job? 
a.   2.98 days 
b.   3.56 days 
c.   2.8 days 
d.   3.48 days


9.  Wife takes twice as much time as Husband and thrice as much time as son to finish a job. If all are working together, they can complete the job in 5 hours. Find the time taken by each of them separately to finish the work. 
a.   Wife = 30 hours, Husband = 15 hours, Son = 10 hours 
b.   Wife = 18 hours, Husband = 9 hours, Son = 6 hours 
c.   Wife = 24 hours, Husband = 12 hours, Son = 8 hours 
d.   Wife = 36 hours, Husband = 18 hours, Son = 12 hours


10.  A is twice as good in fencing a garden as B and takes 8 hours less than B takes. Find the time B would take for fencing the garden. 
a.   10 hours 
b.   16 hours 
c.   12 hours 
d.   18 hours


11.  P, Q, R and S can do a piece of work in 32 days. If P and Q can do it together in 90 days, and R alone in 120 days. Find the time in which S alone can do it. 
a.   82.7 days 
b.   81.7 days 
c.   80.7 days 
d.   84.7 days


12.  Tim can complete a piece of work in 12 days. If Lee works thrice as fast as Tim, find the time both of them take, to complete the work, together. 
a.   4 days 
b.   5 days 
c.   6 days 
d.   3 days

