You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

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

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

The more you take me, the more you leave me behind.
Who Am I?

What is the Surname of Barbie Doll?

Do You See It?

If you say my name, I will no longer exist. What am I?

What month of the year has 28 days?

There is a five-letter word which has 3 consonants(all are same) and 2 different vowels.
Also, something wrong is associated with the word.

Can you name it?