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

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?

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

Take one out and scratch my head, I am now black but once was red. What am I?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

I add 5 to 9 and get 2. The answer is correct, so what am I?

Which is the smallest number that you can write using all the vowels exactly once?

A bus driver was heading down a street in Mexico. He went right past a stop sign without stopping, he turned left where there was a "no left turn" sign, and he went the wrong way on a one-way street. Then he went on the left side of the road past a cop car. Still - he didn't break any traffic laws. Why not?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes