There are few taps and holes in tank. Each tap can fill empty tank in 18 minutes, while each hole can empty a full tank in 24 minutes. If there are 3 taps and 2 holes, how long would it take to fill empty tank?
The graph below shows the production of Televisions (in thousands) of two companies (A and B) for ten years. Find the production of Televisions of B in the year when combined production of Televisions was minimum.
The cost of a bat is a two digit number (for example €xy). Its selling prices has same digits as cost with digits interchanged (€yx). If its profit margin is divided by 9, find the remainder of division.