The third proportional of two numbers 4 and 20 is

What will be the difference between the compound interest and simple interest of 2 years at the rate of 5 percent annual interest at Rs. 4,000?

If one of the equal angles of an isosceles triangle is 65°, then the angle at the vertex is

An observer who is 1.62-meter-tall is 45 meters away form a pole. The angle of elevation of the top of the pole from his eyes is 30°. The height ( in meter) of the pole is closet to:

In a division sum, the divisor is ten times the quotient and five times the remainder. If the remainder is 46, find the dividend.

If the difference between the compound and simple interest on a certain sum of money for 3 years at 5 % per annum is Rs. 15.25, then the sum is 

A sum of money becomes two times of itself in 8 years at simple interest, and it becomes four times of itself in 2 years at compound interest, when interest is compounded annually. Find the ratio of the rate of simple interest to the rate of compound interest offered per year.

The ratio of circumradius and hypotenuse a right-angled triangle is