What happened when the wheel was invented?

You bought me for dinner but never eat me. What am I?

Replace the question mark in the picture below.

What has a ring but no finger?

What is the coolest letter in the alphabet?

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?

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

What number comes next in this sequence:
7 8 5 5 3 4 4 _

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

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