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

You walk into a room where there are three primates held in their respective cages:
1) A lion who is eating the flesh of a goat.
2) An orangutan who is playing with blocks.
3) A donkey who is sitting idle.

Who is the most intelligent primate in the room?

Can you find the company name in the pictogram below?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Why do we preferably have round manhole covers and not square ones?

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?

What kind of storm is always in a rush?

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?

A man died, leaving $10,000,000 for his widow, 5 sons and 4 daughters. Each daughter received an equal amount, each son received twice as much as a daughter, and the widow received three times as much as a son.

How much did the widow receive?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?