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

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

I can turn polar bears white.
I can make anyone dance.
I can make everyone cry
I can make your hands clap
I can make you thin.
I can make you smile.
I can make you smile

Can you guess the riddle?

What is the centre of gravity?

He loves to dance, twist and prance, he shakes his tail, and as a way he sails, wingless he flies into the sky. What is he?

Why are all black people so quick ?

Who always enjoys poor health?

Find the smallest sentence with all the English alphabet.

What part of the chicken has the most feathers?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?