Bank Math

A sum of tk. 427 is to be divided among A, B and C such that 3 times A's share, 4 times B's share and 7 times C's share are all equal. The share of C is:  

After the increase of price of oil by 40%, a family decided to reduce its oil consumption so that the expenditure for oil goes up by 26% only. If the total consumption of oil before the price rise was 10 kg per month, then what is the current consumption oil per month (in kg)?

Find an equation of the horizontal line containing the point (3, 2).

The average of a, b, c is б and a - b = 4, ab = 21; What is the value of c?

A man bought some eggs of which 10% are rotten. He gives 80% of the remainder to his neighbor. Now he is left out with 36 eggs. How many eggs he bought?

A 270 m long train running at the speed of 120 km/hr crosses another train running in opposite direction at the speed of 80 km/hr in 9 seconds. What is the length of the other train?

An amount of Tk. 10,000 becomes Tk. 20,736 in 2 years. If the rate of interest is compounded half yearly, what is the annual rate of interest?

The ages of Sabiha and Suriya are in the ratio of 7 : 3 respectively. After 6 years, the ratio of their ages will be 5 : 3. What is the difference in their ages?

A mixture of 20kg of spirit and water contains 10% water. How much water must be added to this mixture to raise the percentage of water to 25%?

X = { - 4, - 2, 1, 3}, Y = {- 1, 4, 5}. If x is a number from set X, and y is a number from set Y. The probability that x + y is positive is closest to-

A rectangle is 14 cm long and 10 cm wide. If the length is reduced by x cm and its width is increased also by x cm so as to make a square, then its area increased by -

In a group of 15, 7 have studied Latin, 8 have studied Greek, and 3 have not studied either. How many of these studied both Latin and Greek?

If xy < 0, which of the following must be true?
i. x + y = 0 ii. 2y - 2x < 0, iii. x² + y²> 0

The average of 13 numbers is 68. If the average of the first 7 numbers is 63 and that of the last 7 numbers is 70, find the 7th number?

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.

What is the volume of a cube whose surface area is 96?

The average of 10 integers is 16. If the sum of 6 of them is 100. What is the average of other 4?

√(16 + 16) =?

If measures of the angles in a triangle are in the ratio of 1 : 2 : 6, then the degrees in the largest angle:

The 180 students in a group are to be seated in rows to that there are an equal number of students in each row. Each of the following could be the number of rows except -