Why are televisions attracted to people?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?

Count the number of triangles in the given picture.

We are a group of eight brothers. We consider the weak, yet we protect the king in every battle. If we move ahead, we never turn back. Who are we?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

Do you know who was buried in John's tomb?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?