An object weighing 20 kg is raised through a height of 2 m. What will be the work done by the force of gravity in this process?

Ram's father is twice as old as Ram is. Eight years ago the age of Ram's father was 2.5 times his age. What is Ram's current age?

Assuming that the numbers in each of the following figures follow a similar pattern, select the option that can replace the ? in figure C?

How many triangles are present in the following figure?

Which of the following processes will take place the slowest for the same quantity of liquid?

Qamar gained 16% on the resale of a used stereo. If he purchased the item for Rs. 1500, how much did he sell it for?

Which of the following changes when a body performs uniform circular motion?

A natural number, when divided by 4, 5, 6 or 7, leaves a remainder of 3 in each case. What is the smallest of all such numbers?