Quantitative Aptitude - Arithmetic Ability Questions

In a container, two types of liquids P and Q are in the ratio of 3 : 7. If 10 litres mixture is drawn off from the container and filled with 6 litres of liquid Q,then the ratio of P and Q becomes 1 : 3. What was the original quantity (in litres) of mixture?

Due to increase of k% in the side, the area of a square increases by 69%. What is the value of k?

An equilateral triangle ABC is inscribed in a circle of radius 20√3.
The centroid of the triangle ABC is at a distance d from the vertex A. What is d equal to ?

If Mr. Raghav taught a total of 500 hours, then what is the difference in number of hours of teaching algebra and modern Maths?

A boy buys 5 pencils at Rs 3 each, 3 erasers at Rs 2 each and 3 sharpeners at Rs 5 each. What is the average expenditure (in Rs) per article?

A mother is five times older than her daughter. After 5 years, she would be 3 times older than her daughter. Find the mother's present age.

If [2(4x/5 - 3/4)]/3 - 5/3 = -1/6, then the value of x is?

If A and B are the roots of the equation Ax2 – A2x + AB = 0, then what is the value of A and B respectively?