Time and work - Quantitative aptitude for SBI PO, IBPS PO, RBI grade B, SSC CGL, CHSL exams

1. A and B can do a work in 18 and 24 days respectively. Work together for 8 days and then A left. The remaining work can be finished by B in?
2. A can do a piece of work in 12 days and B can do it in 18 days. They work together for 2 days and then A leaves. How long will B take to finish the remaining work?
3. A and B can do a job in 6 and 12 days respectively. They began the work together but A leaves after 3 days. Then the total number of days needed for the completion of the work is:
4. A and B can do a piece of work in 30 days while B and C can do the same work in 24 days and C and A in 20 days. They all work together for 10 days when B and C leaves. How many days more will A take to finish the work?
5. A and B can together finish a work in 30 days. They work together for 20 days and then B left. After another 20 days, A finished the remaining work. In how many days A alone can finish the job?
6. 8 men can do a work in 12 days. After 6 days of work, 4 more men were engaged to finish the work. In how many days would the remaining work be completed?
7. A can finish a work in 24 days, B in 9 days and C in 12 days. B and C started the work but are forced to leave after 3 days. The remaining work was done by A In:
8. A certain number of persons can complete a piece of work in 55 days. If there were 6 persons more, the work could be finished in 11 days less. How many persons were originally there?
9. A and B working separately can do a piece of work in 10 days and 15 days respectively. If they work on alternate days beginning with A, in how many days will the work be completed?
10. A and B can do a piece of work in 28 and 35 days respectively. They began to work together but A leaves after sometime and B completed the remaining work in 17 days. After how many days did you leave?

1. 5 1/3 days
2. 13 days
3. 6 days
4. 18 days
5. 60 days
6. 4 days
7. 10 days
8. 24 persons
9. 12 days
10. 8 days