A and B can do a work in 9 days and 12 days respectively. If they work on alternate days starting with A, then in how many days will the work be completed?

A can do a certain work in 12 days. B is 60% more efficient than A. How many days does B alone take to do the same work ?

6 goats or 8 sheeps can graze a field in 50 days. 8 goats and 6 sheeps can graze the field in:

2 women and 3 men can do a piece of work in 10 days while 3 women and 2 men can do the same work in 8 days. In how many days can 2 women and 1 man do the work?

35 women can do a work in 15 days. How many women would be required to do the same work in 25 days?

P and Q together can do a job in 6 days. Q and R can finish the same job in 60/7 days. P started the work and worked for 3 days. Q and R continued for 6 days and finish the work. Then, the difference of days in which R and P , independently can complete the job is:

A, B and C can do a work in 10, 12 and 15 days respectively. In how many days will the work be completed if B is assisted by both A and C on every third day ?