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

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?

I am the first thing you need while camping.
I am always with the person named Marcos Valencia and Carrick.
But Pogba Zlatan and Rooney think I am wasteful and do not need me.
I am the second to the last thing to add when you are making a patch.

What am I?

Can you solve below mathematical equation?

2^1234 - 2^1233

Can you count the number of squares in the figure below?

Can you count the number of triangles inside a triangle?

The more of this there is, the less you see. What is it?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

What is the word or phrase?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?