List of top Arithmetic and Mental Ability Questions on Time and Work

12 Men can complete a work in 20 days. Working after 5 days, 6 men left. In how many more days will the remaining work be completed by the remaining 6 Men?

A can complete a work in 15 days and B can complete the same work in 45 days . Together, they can complete the same work in

A tank can be filled by pipe P in 2 hours and pipe Q in 6 hours. At 10 am pipe P was opened. At what time will the tank be filled if pipe Q is opened at 11 am?