Quantitative Aptitude - Arithmetic Ability Questions

The volume of a hemisphere is 5749.33 cm³. Find its diameter (in cm).

The mean of the data 3, 10, 10, 4, 7, 10, 5 is

The difference between Charles' and Shriya's ages is 6 years. When they married each other 30 years ago, 4 times Charle's age was the same as 5 times the age of Shriya. What is the current sum of their ages?

The total surface area of a cube is 73.5 sq.cm. Find its side (in cm).

A polygon has 9 sides. What is its interior angle?

If Cosecθ + Cotθ = 2, then Cotθ = ?

Which of the following numbers is not a prime number?

From the top of a platform 5 m high, the angle of elevation of a tower was 30 deg. If the platform was positioned 40√3 m away from the tower, how tall was the tower?