What goes up but never comes down?

When it's bad luck to meet a black cat?

I have a big mouth and I am also quite loud! I am NOT a gossip but I do get involved with everyone's dirty business.

What does below chemistry rebus means?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

When we see 2 but call 10?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

What is harder to catch the faster you run?