11. A can complete a piece of work in 18 days, B in 24 days, and C in 36 days. In how many days can they complete the work together?
a) 9 days
b) 8 days
c) 7 days
d) 6 days
The correct answer is: A
12. If A and B together can complete a work in 12 days and A alone can complete it in 20 days, how long will B take to complete the work alone?
a) 20 days
b) 25 days
c) 30 days
d) 15 days
The correct answer is: B
13. A can do a job in 6 days, and B can do the same job in 12 days. If A and B work together, how long will they take to complete the job?
a) 5 days
b) 6 days
c) 4 days
d) 7 days
The correct answer is: C
14. If 10 men can finish a piece of work in 15 days, how many days will 5 men take to finish the same work?
a) 30 days
b) 20 days
c) 25 days
d) 10 days
The correct answer is: A
15. If A can complete a work in 40 days, and B can complete it in 60 days, in how many days will they finish the work if they work together?
a) 24 days
b) 20 days
c) 30 days
d) 15 days
The correct answer is: B
16. If 15 men can complete a job in 8 days, how long will 12 men take to complete the same job?
a) 10 days
b) 12 days
c) 9 days
d) 8 days
The correct answer is: A
17. A can complete a task in 25 days and B in 50 days. If they work together, how long will they take to complete the task?
a) 15.67 days
b) 20.67 days
c) 16.67 days
d) 17.67 days
The correct answer is: C
18. If A can complete a work in 15 days and B can complete the same work in 10 days, how long will it take for both A and B to complete the work together?
a) 6 days
b) 5 days
c) 7 days
d) 8 days
The correct answer is: A
19. A and B together can finish a work in 6 days. A can finish the same work alone in 10 days. How many days will B take to finish the work alone?
a) 12 days
b) 15 days
c) 10 days
d) 8 days
The correct answer is: B
20. If 9 men can finish a work in 14 days, how many days will it take for 6 men to finish the same work?
a) 21 days
b) 20 days
c) 18 days
d) 15 days
The correct answer is: A
