How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

There was a minor accident with a doctor's son but the doctor noticed no major injury. After the treatment, the father of that doctors son is sitting with the son of the doctor without the doctor being in the room.

How can this be possible?

Count the Triangle in the figure given below:

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

Find out the missing number in the picture attached:

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

I am the fastest animal but cannot climb the tree. What am I?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

What has no start, end, or centre?