Quantitative Aptitude - Arithmetic Ability Questions

The mean of marks secured by 45 students in division A of class X is 56, 40 students of division B is 52 and that of 40 students of division C is 50. Find the mean of marks of the students of three divisions of Class X.

A spaceship travels at 1,260 km/h. How many metres does it travel in 1/10 th of a second?

In the series 5442673314884743581,the number of 4s that are completely divisible by the number on their right but not divisible by the number on their left is

In the given figure, PQ is the diameter of the circle. What is the measure (in degrees) of QSR?

A cylindrical capsule has hemispherical ends of the radii equal to radius of the cylindrical part. If length of the capsule is 40 m and radius 6 m, what is the total surface area of this capsule?

Select the odd word/letters/number/number pair from the given alternatives.

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

Factorise x2 + 3x -­ 18