Mastering Numbers and Work Efficiency

If A can complete a work in 10 days, how much work can A do in 3 days?

• 1/5 of the work

• 2/10 of the work

• 3/10 of the work

• 4/10 of the work

B can finish a task in 15 days. How much of the work can B complete in 5 days?

• 1/4 of the work

• 1/2 of the work

• 2/3 of the work

• 1/3 of the work

A and B can complete a work together in 6 days. If A alone can do it in 10 days, how long will B take to finish it alone?

• 20 days

• 18 days

• 15 days

• 12 days

If C can do a job in 12 days and D can do it in 15 days, how long will they take to complete the job together?

• 8 days

• 6.67 days

• 5 days

• 10 days

A can do a piece of work in 8 days, while B can do it in 12 days. How long will it take them to complete the work together?

• 5 days

• 3.2 days

• 4.8 days

• 6.4 days

If two workers can complete a task in 20 days together, how much of the work can they complete in 5 days?

• 3/4 of the work

• 1/2 of the work

• 1/5 of the work

• 1/4 of the work

A can complete a task in 4 hours, B in 6 hours. How long will it take them to finish the task together?

• 2.4 hours

• 5 hours

• 3 hours

• 1.5 hours

If a job takes 30 hours to complete by one worker, how many hours will it take for three workers to complete the same job if they work at the same rate?

• 10 hours

• 25 hours

• 20 hours

• 15 hours

A can do a work in 5 days, B in 10 days, and C in 15 days. How long will it take for all three to complete the work together?

• 30/11 days

• 25/9 days

• 15/4 days

• 20/7 days

If A works twice as fast as B and they complete a job in 12 days together, how long would A take to complete the job alone?

• 24 days

• 18 days

• 30 days

• 12 days