It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

What does a man do only once in his lifetime, but women do once a year after they are 29?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your

For this puzzle, you might have to find logic in something illogical. But hey, it's fun and a healthy little break from your strenuous puzzle-solving sessions.

Can you decipher the meaning in the following cluster of letters?

ITIT,NCENTCENT

What is the fastest way to double your money?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

Buy me, smell me or deliver me, I do not change.

Who am I?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?