Quantitative Aptitude - Arithmetic Ability Questions

Three solid spheres of radius 3 cm, 4 cm and 5 cm are melted and recasted into a solid sphere. What will be the percentage decrease in the surface area?

Two valves P and B can fill a sump in 37.5 minutes and 45 minutes respectively. Both valves are opened. The sump will be filled in just 30 minutes, if valve B is turned off after

Raghu's tanker can fill a cistern in 4 hours. After half the cistern is filled, three more similar tankers are opened. What is the total time taken to fillthe cistern completely?

In the following question, select the odd word pair from the given alternatives.

Find the value of 64344?

If 3(2 - 3x) < 2 - 3x ≥ 4x -6; then x can take which of the following values?

If there are four lines in a plane, then what cannot be the number of points of intersection of these lines?

Volume of a cube is 512 cubic cm, find its total surface area? (Take π = 22/7)