Bank Math

A pipe fills a tank in p minutes and another pipe fills the tank in q minutes. A different pipe makes the tank empty in r minutes. If all these three pipes are opened then in how many minutes the tank will be full?

The average of 6 numbers in 25. If 3 more numbers, with an average of 22 are added to these numbers, what will be the average of the combined 9 numbers?

Find out the missing number in the following series. 65536, 256, 16, _____?

In a group of 60 people 27 people like Coca Cola and 42 people like Pepsi Cola. Each person likes at least one of the two drinks. How many of these people like both Coca Cola and Pepsi Cola?

Solution set of the inequality: x - 5 > 4x + 7 is

If a rectangle's length and width are both doubled, by what percent is the rectangle's area increased?

If you subtract - 1 from + 1, What will be the result?

If 15 is the 6th number in a series of 6 consecutive odd numbers what is 4th number in the series?

a, b, c, d and e are five consecutive integers in increasing order of size. Which one of the following expression is not odd?

In a garden, there are 10 rows and 12 columns of mango trees. The distance between two trees is 2 meters and a distance of one meter is left from all sides of the boundary of the garden. What is the length of the garden?

If log_x(27/64) = - 3, then x = ?

During a certain season, a team won 80 percent of its first 100 games and 50 percent of its remaining games. If the team won 70 percent of its games for the entire season, what was the total number of games that the team played?

If A = {1, 4, 9, 16, 25}, the number of proper subsets of A is

The average of 8 numbers is 8. If 4 is subtracted from each of 6 of the numbers, what is the new average?

A map has a scale of 1 cm to 3 km, what length on actual ground does a 3 cm length on the map represent?

Rina and Shila entered into a partnership with their capitals in the ratio 5 : 6 At the end of 8 months, Rina withdraws her capital. If they receive the profit in the ratio of 5 : 9, find how long Shila's capital was used?

What value of x satisfies to equation x - 2 = 2 - x?

A motorcycle costs Tk. 2,500 when it is brand new. At the end of each year it is worth 4/5 of what it was at the beginning of the year. What is the motorcycle worth when it is 3 years old?

In a set of 3 numbers, the average of first two numbers is 2, the average of the last two numbers is 3, and the average of the first and the last numbers is 4. What is the average of three numbers?

Each boy contributed money equal to the number of girls and each girl contributed money equal to the number of boys in a class of 60 students. If the total contribution thus collected is Tk. 1,600, how many boys are there in the class?