You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

When we see 2 but call 10?

Why is the Hole below a Lock?

There is a place where if I stand up straight, I will still be considered sideways.

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

What does it mean?

What can go through glass without breaking it?