10 questions · type your answer and click Check · try to match the answer style shown in examples
1A finishes a job in 20 days, B in 30 days. Find combined time.
2A finishes a job in 6 days, B in 3 days. Find combined time.
3A's rate is 1/9 per day. How much work is done in 4 days?
4A does a job in 15 days, B in 10 days, C in 30 days. Find combined time for all three.
5A is twice as efficient as B and together they finish in 6 days. Find A's time alone.
6A can complete a job in 18 days. How many days to finish 2/3 of the job?
7A and B together finish a job in 8 days; A alone takes 12 days. Find B's time alone.
8A's rate is 1/6 per day and B's is 1/3 per day. Find combined time.
9If 4 workers finish a job in 9 days, how long would 6 workers take (same rate each)?
10A takes 10 days, B takes 15 days; if they work together for 3 days, what fraction is completed?