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

I’m orange, I wear a green hat and I sound like a parrot. What am I?

If 1+9+8=1, what is 2+8+9?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

I am white when I am dirty, and black when I am clean. What am I?

Which letter of the alphabet has the most water?

On a beautiful Sunday morning, You ordered a hot tea to your hotel room and suddenly you remember an important thing that needed to be done right now will take around 3 minutes to complete.
Like most people you like your tea to be hot while drinking so, when should you pour cream in the tea?
1. straight away
2. Just people, you drink the team
3. Its does not matter

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

Which alphabet letter is a question?