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

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

What work can one never finish?

How many triangles can you count in the figure given?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

4 fathers, 2 grand-fathers and 4 sons went to watch the movie.What is the minimum number of tickets they need to buy ?

How many letters are in the alphabet?

We can be boring,Or interesting.
We can be long,Or short.
We can have pictures,Or just words.
Many love us,But many also hate us.
What are we?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.