What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

If eleven plus two equals one, what does nine plus five equal?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?