How many sides does a circle have?

What has one eye, but can’t see?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

Can you find the mistake in the below statement?

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 maths symbol is hidden in the below Bar Graph. Can you decipher it?

A dead body is found outside a multi-story multinational company. The case is reported and a homicide detective is called on the crime scene.

He looks at the body and then towards the building. From the position of the body, it is evident that the victim committed suicide. He goes to the first floor of the building and then walks in the direction of the dead body, opens the window and toss a coin in the air.

He goes to second floor and again repeats the process. He keeps doing this till he is done on all the floors. Then he returns back to the floor and tells his team that it is a murder.

How in heaven did he deduce that?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

Which is Odd One Out and why?

4377

3954

9862

8454

9831