Quantitative Aptitude - Arithmetic Ability Questions

Diameter of a car wheel is 21 cm. A car driver moving at the speed of 66 km/hr takes 36 seconds to reach a destination. How many revolutions will the wheel make during the journey?

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?

U and V started a business by investing amounts Rs 184000 and Rs 224000 respectively. If U’s share in the profit received at the end of year is Rs 20700, then what will be the total profit (in Rs) earned by them together?

A boy running at 10/9 th of his actual speed covers 39 km in 2 hours 20 minutes and 24 seconds. Find the actual speed of the boy (approx.)

The sum of a fraction and 7 times its reciprocal is 11/2. What is the fraction?

The mean deviation of the data 3, 10, 10, 4, 7, 10, 5 is :

2cos[(C+D)/2]sin[(C-D)/2] is equal to

If x + y = 12 and x2 + y2 = 94, then xy is