Quantitative Aptitude - Arithmetic Ability Questions

A solid sphere has a radius 21 cm. It is melted to form a cube. 20% material is wasted in this process. The cube is melted to form hemisphere. In this process 20% material is wasted. The hemisphere is melted to form two spheres of equal radius. 20% material was also wasted in this process. What is the radius (in cm) of each new sphere?

A sum fetched a total simple interest of Rs.5,400 at the rate of 12.5 %/yr in 4 years. What is the sum (in Rs)?

Selling price of an article is Rs 1144. If loss percentage is 12%, then what is the cost price (in Rs) of article?

The product of the ages of Swati and Aparna is 120. If thrice the age of Aparna is more than Swati's age by 2 years, find the age of Swati.

Two spheres of equal radius are taken out by cutting from a solid cube of side (12 + 4√3) cm. What is the maximum volume (in cm3) of each sphere?

What is the value of (-7776)25

If p/q = (x+3)/(x-3), then what is the value of p2+q2p2-q2 ?

Select the odd word/letters/number/number pair from the given alternatives.