Quantitative Aptitude - Arithmetic Ability Questions

The mean of marks secured by 50 students in division A of class X is 61, 25 students of division B is 57 and that of 50 students of division C is 55. What will be the mean of marks of the students of three divisions of Class X?

If 3x -­ 7 = 5x ­- 1, then the numerical value of (x ­- 4)2 is 

If sec θ (cos θ + sin θ) = √2, then what is the value of (2 sin θ)/(cos θ – sin θ)?

In a school 60% of the students are girls. If number of boys is 480, then what is the total number of students in the school?

The perimeters of a square and an equilateral triangle are equal. If the diagonal of the square is 9 cm, what is the area of the equilateral triangle?

In ΔXYZ measure of angle Y is 90 deg. If cot X = 5/12, and XY = 2.5 cm, then what is the length (in cm) of side XZ?

If A is equal to 20% of B and B is equal to 25% of C; then what percent of C is equal to A?

The effective annual rate of interest corresponding to a nominal rate of 15% per annum payable half-yearly is