Quantitative Aptitude - Arithmetic Ability Questions

The base and hypotenuse of a right angled triangle is 12 cm and 5 cm respectively. Find the circum-radius (in cm) of the triangle.

PQ is the chord of a circle whose centre is O. ROS is a line segment originating from a point R on the circle that intersect PQ produced at point S such that QS = OR. If ∠QSR = 30°, then what is the value (in degrees)of POR?

Two ships are sailing in the sea on the two sides of a light house. The angle of elevation of the top of the light house as observed from the two ships are 30° and 45° respectively. If the light house is 100m high, the distance between the two ships is :(take √3=1.73)

Which of the following is the prime number series from 1 to 20?

If the standard deviation of a population is 7, what would be the population variance?

What is the value of 12 + 3(-2 x 3) - (18 / 6) ?

If the angles of a triangle are in the ratio of 2:3:5, then find the ratio of the greatest angle to the smallest angle.

Find the in-radius (in cm) of an equilateral triangle whose sides are 6 cm each.