X is twice as good a workman as Y and together they finish a piece of work in 18 days. In how many days will X alone finish the work?

A is twice as good a workman as B and together they finish a piece of work in 14 days. The number of days that A alone will take to finish the work is:

Vandana can do a piece of work in 25 days. Vasvi is 25% more efficient then Vandana. The number of days taken by Vasvi to do the same piece of work is:

Mohan asked 36 men to build his house in 30 day. 50% of the work got completed in just 10 days. So, Mohan removed some workers. Now, how many persons does he need to complete the remaining work in decided time?

A, B and C can do some work in 40 days. A and C together can do twice as much work as B alone. Find the time taken by B to do the whole work.

A is twice as good a worker as B, and together they finish a piece of work in 16 days. In how many days will A alone finish the work?

P and Q can do work separately in 10 and 20 days, respectively. In how many days can they finish it, working together?