Quantitative Aptitude - Arithmetic Ability Questions

In a committee there are 15 members. If two members whose ages are 45 years and 55 years are replaced by the two new members, then average age of 15 members is increased by 2 years. What is the average age (in years) of the new members?

In the given figure, ABC is a right angled triangle. ABC = 90 deg and ACB = 60 deg. If the radius of the smaller circle is 2 cm, then what is the radius (in cm) of the larger circle?

Mummy can bake 75 cakes in 15 hours, Mummy and Sister together can bake 120 cakes in 20 hours. How many cakes Sister can bake in 30 hours?

If α and β are the roots of equation x2 – 2x + 4 = 0, then what is the equation whose roots are α3/β2 and β3/α2?

The area of an equilateral triangle is 9√3 sq cm, find its perimeter?

If 2x+29x = 4, then the value of 27x3+127x3

If x = √2+1, then the value of x4-1/x4

What is the compound interest earned on Rs 80,000 at 40% per annum in 1 year compounded quarterly?