What seven-letter word has hundreds of letters in it?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

What brings you down but never up?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

The husband and wife were jogging in the morning. To match every two steps of the husband, the wife required three steps. If Both of them start with the here right foot. After how many steps do their left foot be together?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

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