The strength of Gopal is twice that of Sandeep, whereas the strength of Sandeep is thrice that of Mohit. If Gopal can do the complete work in 5 days, then how many days are required to do the complete work by three of them?

3 men and 4 women do a work in 10 days as 2 men and 6 women do. 4 men and 8 women starts the same work and after 2 days only women remains in the work for completing it.

How many days are required to complete the work ?

Six men do a piece of work in 10 days with an effort of 6 hours per day. How many extra men are required for doing the work of double strength in 4 days with an effort of 5 hours per day

A and B can complete a work in 12 days. B and C can complete the same work in 18 days. C and A can complete in 24 days. How many days will take for A, B and C combined together to complete the same amount of work?

If A men working A hours a day can do A units of a work in A days, then how many units of work can be completed by B men working B hours per day.