Q1A can finish a job in 10 days, B in 15 days. Together they finish in:

Q2If someone finishes work in n days, their daily rate is:

Q3Which ancient text first recorded work-rate problems?

Q4A alone takes 12 days; A+B together take 4 days. B alone takes:

Q5Doubling workers on a job (same efficiency) will:

Q612 workers build a wall in 9 days. How many workers can build the same wall in 6 days?

Q7A is twice as fast as B. Together they finish a task in 8 days. How long would A take alone?

Q8Pipes A and B fill a tank in 8 and 12 hours; pipe C empties it in 24 hours. All three open together fill it in:

Q9Using the LCM method on the original A=10, B=15 problem, total work units = ?

Q10A is twice as fast as B. Together they finish a job in 12 days. Days A alone takes: