Quantitative Aptitude - Arithmetic Ability Questions

At 6% simple interest per annum a sum of money became Rs. 834 in 6.5 years. The sum initially invested was

The speed of car B is half the speed of car A. If car A covers a distance of 120 km in 1.5 hours, what is the speed of car B?

Diameter of wheel of a cycle is 21 cm. The cyclist takes 45 minutes to reach a destination at a speed of 16.5 km/hr. How many revolutions will the wheel make during the journey?

ΔABC is similar to ΔPQR. Length of AB is 18 cm and length of the corresponding side PQ is 12 cm. If area of ΔABC is 324 sq cm, what is the area of ΔPQR?

Find the total surface area (in cm2 ) of a hemisphere of diameter 42 cm.

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?

If 4x - 5y = -37 and 7x + y = -16, then x - y = ______

α and β are the roots of the quadratic equation x2 – x – 1 = 0. What is the value of α8 + β8?