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

What question can you never answer yes to?

What seven-letter word has hundreds of letters in it?

Can you count the number of matches in the picture below ?

There was a greenhouse.
Inside the greenhouse, there is a white house.
Inside the white house, there is a red house.
Inside the red house, there are lots of babies.

What is It?

Find the last number in the series below:

voN luJ yaM raM ---

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

Give it food and it will live; give it water and it will die.

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?