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?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

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’m tall when I’m young, and I’m short when I’m old. What am I?

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?

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?