Quantitative Aptitude - Arithmetic Ability Questions

Karan, Arjun, Preeti, Priya and Ashish are travelling in a car. Three years ago, the average age of Arjun, Preeti and Priya was 42 years. If the present age of Karan is 65 years and the present average age of all five is 50 years, then what is the present age of Ashish?

If a - b = -5 and a2+b2=73, then find ab.

The average height of 30 boys out of a class of 50 is 160 cm. If the average height of the remaining boys is 165 cm, the average height of the whole class (in cm) is:

If [7(5x/3 - 3/2)]/2 + 3/2 = 1/4, then what is the value of x?

S and T can finish a work in 50 days. They worked together for 20 days and then left. How much of the work is left?

A train has to cover a distance of 900 km in 25 hours. What should be its average speed in meters/second?

Each member of a club contributes as much rupees and as much paise as the number of members of the club. If the total contribution is Rs. 2525, then the number of members of the club is

What least value which should be added to 1812 to make it divisible by 7, 11 and 14?