1. A, B and C can complete a piece of work in 24, 6 and 12 days respectively. Working together, they will complete the same work in:
3 3/7 days
None of the above2. P, Q and R are three typists who working simultaneously can type 216 pages in 4 hours. In one hour, R can type as many pages more than Q as Q can type more than P. During a period of five hours, R can type as many pages as P can during seven hours. How many pages does each of them type per hour?
14, 17, 20
15, 17, 22
15, 18, 21
16, 18, 22
None of the above3. A and B can do a work in 8 days, B and C can do the same work in 12 days. A, B and C together can finish it in 6 days. A and C together will do it in:
None of the above4. A works twice as fast as B. If B can complete a work in 12 days independently, the number of days in which A and B can together finish the work is:
None of the above5. A and B can do a job together in 7 days. A is 1 3/4 times as efficient as B. the same job can be done by A alone in:
9 1/3 days
12 1/4 days
16 1/3 days
None of the above6. A machine P can print one lakh books in 8 hours, machine Q can print the same number of books in 10 hours while machine R can print them in 12 hours. All the machines are started at 9 a.m. while machine P is closed at 11 a.m. and the remaining two machines complete the work. Approximately at what time will the work be finished?
None of the above7. A and B together can do a piece of work in 12 days, which B and C together can do in 16 days. After A has been working at it for 5 days and B for 7 days, C finished it in 13 days. In how many days C alone will do the work?
None of the above8. A, B and C can do a piece of work in 36, 54 and 72 days respectively. Then started the work but A left 8 days before the completion of the work while B left 12 days before the completion. The number of days for which C worked is:
None of the above9. 10 women can complete a work in 7 days and 10 children take 14 days to complete the work. How many days will 5 women and 10 children take to complete the work?
Cannot be determined
None of the above10. If 12 men and 16 boys can do a piece of work in 5 days; 13 men and 24 boys can do it in 4 days, then the ratio of daily work done by a man to that of a boy is:
2 : 1
3 : 1
3 : 2
5 : 4
None of the above