Answer:
What do you call a snake that's exactly 3.14 feet long?
How do you know if a tiger is male or female?
What is the best cure for dandruff?
What has ears but does not listen
I have one, you have one. If you remove the first letter, a bit remains. If you remove the second, bit still remains. If you remove the third, it still remains.
People take me on walks and I run and have fun. What am I?