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

The more you take me, the more you leave me behind.
Who Am I?

What is harder to catch the faster you run?

Which of the below owl is odd one out?

All of you like to eat me. I am a five-lettered word. Remove the first two and I turn into an infamous animal. Remove just the first and I become a heinous crime. Remove the first and the last and you can groove on me.

Can you guess who am I?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

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

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

Replace the question mark with the correct number in the below-given picture?