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Question 1:

Two persons can complete a piece of work in 9 days. How many more persons are needed to complete twice the work in 12 days?

Question 2:

K and L can do a work in 15 and 20 days respectively. They work together for 5 days and leave. Calculate the unfinished portion of the work.

Question 3:

What number must be subtracted from $3,5,6$, and $7$ so that they become proportionate to one?

Question 4:

3 men and 4 women can do a piece of work in 7 days, whereas 2 men and 1 woman can do it in 14 days. Seven women will complete the same work in:

Question 5:

A man and a woman working together can do a certain work in 18 days. Their skills in doing the work are in the ratio $3: 2$. How many days will the woman take to finish the work alone ?

Question 6:

A and B can do a job alone in 12 days and 15 days respectively. A starts the work and after 6 days B also joins to finish the work together. For how many days B actually worked on the job?

Question 7:

$4$ men can complete a certain work in 12 days if they work 6 hours in a day. In how many days 12 men can complete the work if they work 16 hours in a day.

Question 8:

A is thrice as efficient as B. A takes 24 days less than $B$ to comlete a work. If they work together, in how many days, will the work be completed?

Question 9:

A can complete a task in 8 days while B can complete it in 12 days. In how many days can C complete the task if all 3 of them together can complete it in 3 days?

Question 10:

Rekha reads 15 pages in 25 minutes. How many pages will she complete in 45 minutes?