What is more useful when it is broken?

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?

Three playing cards in a row. Can you name them with these clues? There is a two to the right of a king. A diamond will be found to the left of a spade. An ace is to the left of a heart. A heart is to the left of a spade. Now, identify all three cards.

I have an eye but still cannot see.

Who am I?

What will you call your mother's brother's brother-in-law?

Which alphabet letter is a question?

what does the below rebus means?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?