Quantitative Aptitude - Arithmetic Ability Questions

If the angles of a triangle are in the ratio of 2 : 5 : 8, then find the value of the smallest angle.

The angle of depression of the foot of a building from the top of a tower 30 m away is 30 deg. How high is the tower?

____ are twin prime numbers.

___ is the point at which the perpendicular bisectors of the sides meet and the center of the circle that circumscribes the triangle is ____.

What is the square root of 576?

What is the fraction which, when taken away from 1/2, gives 2/3?

Which of the following numbers is a prime number?

In a triangle, one of the angles is three times the smallest and another is two times the smallest angle. Calculate the smallest angle.