I have feet, but no legs. Which animal Am I?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

What does the rebus below mean?

TEN BADTION

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

A little girl goes to the store and buys one dozen eggs. As she is going home, all but three break. How many eggs are left unbroken?

I add 5 to 9 and get 2. The answer is correct, so what am I?

There was once a college that offered a class on probability applied to the real world. The class was relatively easy, but there was a catch. There were no homework assignments or tests, but there was a final exam that would have only one question on it. When everyone received the test paper it was a blank sheet of paper with a solitary question on it: 'What is the risk?'.Most students were able to pass, but only one student received 100% for the class! Even stranger was that he only wrote down one word!
What did he write?

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?