Quantitative Aptitude - Arithmetic Ability Questions

The mean of marks secured by 35 students in division A of class X is 65, 45 students of division B is 61 and that of 70 students of division C is 59. What is the mean of marks of the students of three divisions of Class X?

How many three digit whole numbers are there between 75 and 405?

The variance of a set of data is 121. Then the standard deviation of the data is

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

Consider the circle shown below having angle AOB as 135 deg and the shaded portion is the x part of the circular region. Calculate the value of x.

The perimeter and the breadth of a rectangle are 68 cm and 10 cm respectively. Calculate the length of its diagonal (in cm).

The side of an equilateral triangle is 8 cm. Find its area (in cm2).

How many prime numbers are there between the positive integers 60 and 100?