Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

The doctor advised his patient to take a tablet after every fifteen minutes. He gave him five tablets in total.

How much time will he take to have all the five tablets?

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

I make two people out of one. What am I?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Can you make a fire with just a single stick?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?