Quantitative Aptitude - Arithmetic Ability Questions

$$\begin{gathered} If (x – 2)2 + (y + 3)2 + (z – 15)2 = 0, then what is the value of \\ x + y + z – 5? \end{gathered}$$

Find the area (in sq.cm) of a semi-circle of radius 14cm.

HCF of two numbers is 19 and their LCM is 665. If one of the number is 95, find the other.

On selling 120 bottles, Vijay earns profit equal to the cost price of 10 bottles. What is the profit percentage?

What is the mean of the first five Triangular Numbers?

The mean of the data 1, 1/2, 1/2, 3/4, 1/4, 2, 1/2, 1/4, 3/4 is

In a fraction when 3 is added to its numerator and denominator it becomes 4/5. And it becomes 1/2 when 2 is subtracted from both the numerator and denominator. Find the fraction.

Which of the following numbers is not a prime number?