P can do a piece of work in 10 days. Q can do it in 16 days. With the help of R, they finish the work in 4 days. In how many days can R alone do the whole work?

- 15 men can complete a piece of work in 5 days, while 20 women can complete it in 5 days. 8 men start working on the job & after working for 3 days, all of them stopped working. How many women should be put on the job to complete the remaining work in 4 days?
- ‘A’ and ‘B’ can do a piece of work in 15 days and 20 days, respectively. They started working together but ‘A’ left after 3 days. Find the time taken by ‘B’ to complete the remaining work.
- P and Q can do a piece of work in 32 and 40 days respectively. They began to work together but P leaves after sometimes and Q completed remaining work in 16 days. After how many days did P leaves (in days)?
- A is twice as good a workman as B and together they finish a piece of work in 14 days. The number of days taken by A alone to finish the work is
- ‘A’ and ‘B’ can do a piece of work in 30 days and 40 days, respectively. They started working together but ‘A’ left after 9 days. Find the time taken by ‘B’ to complete the remaining work.
- 12 men take 6 days to complete a piece of work. They worked for a period of 2 days. After that, they were joined by 4 more men. How many more days will be taken by them to complete the remaining work?
- A alone can complete 40% of a work in 18 days while B takes 15 days more than A to complete it. If B and C together can complete the work in 20 days, then find the time taken by C alone to complete the same work.
- P does one fourth as much work as Q in two third of the time. If together they take 24 days to complete the work, how much time shall Q take to do it?
- A job is done by 15 men in 30 days and 30 women in 20 days. How many days will it take for 8 men and 12 women to finish the work?
- When 24 men work for only 3 days, 5/6th of work remains unfinished. How much work will remain unfinished if 27 men work for only 2 days?

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