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

Can you make a fire with just a single stick?

One night, a man runs away from home. He turns left and keeps running. After some time he turns left again and keeps running. Later, he turns left one more time and runs back home—but when he gets home, he finds a man in a mask. Who was the man in the mask?

Find the next number in the series.
1 10 24 43 67 ?

I taste better than I can smell. Who am I?

what does this below rebus represent identXQQQQQME

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

There are two insects on a tile. Insect X is sitting on one side of the tile (point A) and Insect Y is sitting opposite on the other side of the tile (point B). Now both of them decide to change their position and thus X starts crawling to point B and Y starts crawling to point A. When they meet and pass each other in between, X takes 20 seconds to reach B and Y takes just 5 seconds to reach A.

Can you calculate the total time each of the insects took to change their positions?

What can jump higher than a building?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?