Bank Math

A shopkeeper marks the price of an article at TK. 80. What will be the selling price, if he allows two successive discounts of 5% each? 

The average age of the 20 aspirants of a class is 19.2 years. After some time two more aspirants join them and then average is increased by 0.3 years. Find the difference between the age of new aspirants.

If the radius of a circle is decreased by 20% then the area is decreased by: 

A and B invest in a business in a ratio of 3 : 2. If 5% of the total profit goes to charity. A's share is Tk. 855, the total profit is:

How many prime numbers are there between 90 and 100?

In a row of trees, a tree is 7^th from the left and 14^th from the right end. How many trees are there in the row?

What is the sum of two consecutive even numbers the difference of whose squares is 84?

A coin is tossed twice. What is the probability of getting head on first toss and tail on second toss?

In how many ways a team of 11 members can be formed from a group of 15 students if a students who is the owner of the ball is always considered a member of the team?

If the mean of numbers 28, x, 42, 78 and 104 is 62, what is the mean of 48, 62, 98, 124 and x?

The total cost of flooring a room at Tk. 8.50 per square meter is Tk. 510. If the length of the room is 8m, what is its breadth?

What is the slope of the line perpendicular to the line by y = -5x + 9?

What is the ratio of 8 inches to 6 feet?

The hour hand of an analog clock moves (1/60)^th of a degree every minute. Then how many degrees will the hour hand move in one hour?

The average daily wage of 10 workers is Tk. 400. if the lowest wage is Tk. 300, then what is the possible maximum wage?

The length, breadth, and height of a rectangular box are in the ratio 3 : 2 : 1. If its total surface area is 352 cm², what is its volume in cm³?

A man spent 1/2 of his money and then lost 1/4 of the remainder. He was left with Tk. 3,600. How much did he start with?

An accurate clock shows 8 o’clock in the morning. Through how many degrees will the hour hand rotate when the clock shows 2 o’clock in the afternoon?

A hawker buys every 4 oranges at Tk. 25 and then sells every 8 oranges at Tk. 56. What is the percentage of the profit?

A, B and C invested capitals in the ratio of 4 : 6 : 9. At the end of the business term, they received  the profit in the ratio of 2 : 3 : 5. Find the ratio of their time for which they contributed their capitals .