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?

Why Wine Glass Stem is so long?

Which of the below owl is odd one out?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

I have eight fingers and two thumbs but I do not live. What Am I?

By using all numbers, i.e. 123456789 and subtraction/addition, operators number 100 can be formed in many ways.
Example: 98 + 7 + 6 - 5 - 4 - 3 + 2 - 1 = 100

But if we add a condition use of the number 32 is a must. Then there are limited solutions.
One of such solution is: 9 - 8 + 76 + 54 - 32 + 1 = 100

Can you tell me any other solution?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

What is the centre of gravity?

During an experiment, a guy throws a bouncy ball from a 100 feet tall building. The ball has a specific characteristic. Every time it hits the ground, it bounces up halfway.

How many bounces do you think the ball will make before it comes to a stop ?

Why is 6 afraid of 7?