| 1. | Two sisters can complete a job in 6 hours, when working together at their respective constant rates. The elder sister alone can complete the job in 8 hours, in how many hours can the younger sister complete the job alone? |
| a. | | 12 hrs |
| b. | | 24 hrs |
| c. | | 48 hrs |
| d. | | 10 hrs
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| 2. | Anita can do a piece of work in 15 days and Sunita takes 12 days. But if they take the help of Kavita, they can finish their job in 5 days. Find in how many days Kavita alone can finish the job? |
| a. | | 20 days |
| b. | | 10 days |
| c. | | 12 days |
| d. | | 18 days
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| 3. | Husband can finish a piece of work in 8 days while his wife can finish the same piece of work in 16 days. Find in how many days both of them can finish the work, while working together. |
| a. | | 5 days |
| b. | | 5.3 days |
| c. | | 5.5 days |
| d. | | 6 days
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| 4. | Ketty and Betty together take 12 days to complete a piece of work. Ketty alone can finish the work in 18 days. How long would Betty take to finish the same work? |
| a. | | 28 days |
| b. | | 20 days |
| c. | | 30 days |
| d. | | 36 days
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| 5. | 15 men or 18 women can complete a piece of work in 12 days. Calculate the number of days 5 men and 10 women would take to complete the work ? |
| a. | | 11 days |
| b. | | 20/3 days |
| c. | | 10 days |
| d. | | 27/2 days
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| 6. | X takes thrice as much time as Y to sweep the floor and Z takes the same time as the time taken by X and Y, working together. When all three work together, they finish sweeping in 9 hours. Find the time taken by each of them to finish sweeping. |
| a. | | X = 72 hours, Y = 24 hours, Z = 18 hours |
| b. | | X = 24 hours, Y = 72 hours, Z = 18 hours |
| c. | | X = 18 hours, Y = 24 hours, Z = 72 hours |
| d. | | None of the above
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| 7. | Nick and Jose can finish fencing a garden in 15 days, while Nick, Jose and Rose take 10 days to finish. Find the time in which Rose alone can finish the fencing. |
| a. | | 25 days |
| b. | | 20 days |
| c. | | 30 days |
| d. | | 28 days
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| 8. | Bobby can complete a work in 15 days. Rocky is 50% more efficient than Bobby and Rick is 20% more efficient than Rocky. If all of them work together, how long would they take to finish the job? |
| a. | | 2.98 days |
| b. | | 3.56 days |
| c. | | 2.8 days |
| d. | | 3.48 days
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| 9. | Wife takes twice as much time as Husband and thrice as much time as son to finish a job. If all are working together, they can complete the job in 5 hours. Find the time taken by each of them separately to finish the work. |
| a. | | Wife = 30 hours, Husband = 15 hours, Son = 10 hours |
| b. | | Wife = 18 hours, Husband = 9 hours, Son = 6 hours |
| c. | | Wife = 24 hours, Husband = 12 hours, Son = 8 hours |
| d. | | Wife = 36 hours, Husband = 18 hours, Son = 12 hours
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| 10. | A is twice as good in fencing a garden as B and takes 8 hours less than B takes. Find the time B would take for fencing the garden. |
| a. | | 10 hours |
| b. | | 16 hours |
| c. | | 12 hours |
| d. | | 18 hours
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| 11. | P, Q, R and S can do a piece of work in 32 days. If P and Q can do it together in 90 days, and R alone in 120 days. Find the time in which S alone can do it. |
| a. | | 82.7 days |
| b. | | 81.7 days |
| c. | | 80.7 days |
| d. | | 84.7 days
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| 12. | Tim can complete a piece of work in 12 days. If Lee works thrice as fast as Tim, find the time both of them take, to complete the work, together. |
| a. | | 4 days |
| b. | | 5 days |
| c. | | 6 days |
| d. | | 3 days
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