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

Can you move 2 matchsticks to form four equal sized squares.

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

A boy was driving a car, a girl took a lift from her. She asked his name. The boy said - my name is hidden in my car’s number, find it if you can. After this, she got down Car number was [ WV733N ] Can you guess the name now?

What is black when you buy it, red when you use it, and gray when you throw it away?

Why is the Hole below a Lock?

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?