A alone can complete a piece of work in 6 days and B alone can complete the same work in 8 days, then in how many days can A and B together complete the same work?

Aman and Ajay can build a wall in 9 days and 12 days respectively. In how many days can they finish the work if they work together?

A can do a piece of work in 24 day, B in 32 days and C in 64 days. All begin to do it together, but A leaves after 6 days and B leaves 6 days before the completion of the work. How many days did the work last?

P can do a piece of work in 60 days & Q can do the same work in 50 days. Find the ratio of working efficiencies of P to Q.

10 persons can do a job in X days. If 20 persons with twice the efficiency can do the same job in 5 days, then find the value of X?

If 18 men can finish a job in 26 days, then, in how many days will 13 men finish the same job?

A and B can do a piece of work in 18 days. B and C together can do it in 30 days. If A is twice as good a workman C, find in how many days B alone can do the work?

24 women take 14 days to complete a piece of work which can be completed by 14 men in 12 days. 18 men started working and after 5 days, 10 men left and 8 women joined them. How many days will it take them to complete the remaining work?