Which alphabet is a part of our body?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

Why do you find that most of the buildings are deprived of the 13th floor?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

There were two grandmothers and their two granddaughters.
There were two husbands and their two wives.
There were two fathers and their two daughters.
There were two mothers and their two sons.
There were two maidens and their two mothers.
There were two sisters and their two brothers.
Yet there are only six, who are buried here,
All are born legitimate and relationships clear.
How can this happen?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Find the missing number in the sequence below:

What is so fragile that saying its name breaks it?