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

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

Spot the cat in the picture below

Replace the question mark with the correct number in below Picture:

Can you write down eight eights so that they add up to one thousand?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

James Bond is caught up in a mysterious scenario where the evil villain has him blindfolded. He somehow breaks through the handcuffs but is unable to get the blindfold off. Upon searching, he comes across a bow and 3 arrows. He can hear the villain speak, and thus tries to take a shot at him. He launches the first arrow, it misses the villain. He then launches the second arrow and it misses by a greater margin.

What is the probability that this third shot our James bond takes will be worse than the second shot?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

Consider this about a word: The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?