Bank Math

A can complete a project in 20 days and B can complete the same project in 30 days. A and B start working on the project together and A quits 10 days before the project is expected to be completed. How many days in total will the project take to complete?

A and B together can paint a wall in 3 days. A can do it alone in 5 days. How many days would it take B to do this job alone?

x = 2y + 3 and y = - 2; Quantity A = x and Quantity B = - 1

If A can do 1/4 of a work in 3 days and B can do 1/6 of the same work in 4 days, how much will A get if both work together and are paid Tk. 180 in all?

A wholesaler bought 1200 radios for Tk. 18 each. The wholesaler sold 60 percent of the radios for Tk. 30 each and the rest for Tk. 15 each. What is the wholesaler's average (arithmetic mean) profit per radio?

A bag contains 7 red, 9 yellow and 3 black balls. If a ball is picked at random, what is the probability that the ball drawn will be either a red or a black ball.

In 1 -3x ≤ 4, then-

In the picture area of the square ABCD is 196 square miles, O is the center of the circle. What will be the area of the circle in square miles?

The area of a rhombus is 96 sq.cm and the length of one of the diagonals is 16 cm. The length of the other diagonal is -

Three angles of a triangle are in proportion 5 : 6 : 7. Then what is the difference in degrees between he biggest and the smallest angles?

The diagonal of a rectangle is √41 cm and its area is 20cm². What is the perimeter of the rectangle?

10 men survive 24 days on 15 cans of food. How many cans are needed for 8 men to survive 36 days?

What is the value of 0.001/(0.1×0.1)?

A watch which gains 5 seconds in 3 minutes was set at 7 am. In the afternoon of the same day when the true time is 1 pm, the watch will indicate -

Jamal is now four times older than Arif. In 30 years, he will be 18 years older than Arif. What is Jamal's age now in years?

If 61% of Bangladeshi people like coffee and 74% like tea, how many like both?

The highest common factor (HCF) of x² - 1, x⁴ - 1 and x⁴ - x³ + x - 1 is

A³ is odd, which if the following is true?

Jenny notices a consistent, increasing pattern in the number of geese she sees flying over her house each day. If she sees 5 geese on Monday, 8 geese on Tuesday, 11 geese on Wednesday and 14 geese on Thursday and the next week starts on Sunday, on which of the following day of the next week will she see a prime number of geese if the pattern continues?

If each side of a rectangle is increased by 50%, its area will increase by -