Replace the question mark with the correct number below.

If you say my name, I will no longer exist. What am I?

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

There was a strange boy who was born before his father. How can this be possible?

There are two dice with empty faces in front of you and a marker. You can mark any number on each of the faces of the two dice, but you have to display all 31 days of the month using the two of them.

Which numbers will you mark on which dice so that you can easily depict all the dates of the month?

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.

Find out the number of circles in the given picture having Illusion

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?