If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Can you solve the photo plexer logic ?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

The King of a distant land had heard that Birbal was one of the wisest men in the East and so desired to meet Birbal. He sent Birbal an invitation to visit his country.

In due course, Birbal arrived in the distant kingdom. When he entered the palace he was flabbergasted to find not one but six kings seated there. All looked alike. All were dressed in kingly robes. Who was the real king?

The very next moment he got his answer. Confidently, he approached the king and bowed to him.

How did Birbal know who was the real king?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

10 people came into a hotel with 9 rooms and each guest wanted his own room. The bellboy solved this problem.
He asked the tenth guest to wait for a little with the first guest in room number 1. So in the first room, there were two people. The bellboy took the third guest to room number 2, the fourth to number 3, ..., and the ninth guest to room number 8. Then he returned to room number 1 and took the tenth guest to room number 9, still vacant.
How can everybody have his own room?

What number should come in place of the question mark below?

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?