Bank Math

If determinant of a matrix A is Zero than :

The perimeter of a square is equal to the perimeter of a rectangle whose length and width are 6m and 4m respectively. The side of the square is

আরিফ ও আকিবের বয়সের অনুপাত 5 : 3; আরিফের বয়স 20 বছর হলে, কত বছর পর তাদের বয়সের অনুপাত 7 : 5 হবে?

Where does p lie if p² < p?

A man can reach a certain place in 40 hours. If he reduces his speed by 1/15th, he goes 5 km less in that time. Find the total distance covered by him.

If a right-angled isosceles triangle has base 4 cm, then height is:

Find out the missing number in the following series.
31, 29, 24, 22, 17, _______

The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of husband is:

Five persons are travelling in a train-A, B. C, D and E. A is the mother of C who is the wife of E. D is the brother of A and B is the husband of A. How is B related to E?

A container holds 4 quarts of chemicals and 4 quarts of water. How many quarts of water must be added to the container to create a mixture that is 3 parts chemical to 5 parts water by volume?

A lent Tk. 5,000 to B for 2 years and Tk. 3,000 to C for 4 years on simple interest at the same rate of interest and received Tk. 2,200 in all from both of them as interest. The rate of interest per annum is:

IF 2^{2x +1} = 1/8^x+3, then the value of x is

In a shipment of 120 machine parts, 5 percent were defective. In a shipment of 80 machine parts, 10 percent were defective. For the two shipments combined, what percent of the machine parts were defective? 

Which of the following angle can be constructed with the help of a ruler and a pair of compasses?

How many times are the hands of a clock at right angle in a day?

Fahim's collection contains US, Bangladeshi and British stamps. If the ration of US to Bangladeshi stamps is 5 : 2 and the ration of Bangladeshi of British stamps is 5 : 1, what is the ration of US to British stamps?

The sum of the ages of the son and father is 120 years. The father age is 3 times than the son. What is the age of father?

A box contains 4 tennis ball, 6 season and 8 dues balls. 3 balls are randomly drawn from the box. What is the probability that the balls are different?

The population of a village decreases at the rate of 20% per annum. If its population 2 years ago was 10000, the present population is = ?

Sum of 10 integer is 462. The average of first 4 number is 52 and the average of last 5 number is 38. What is the fifth number?