If eleven plus two equals one, what does nine plus five equal?

Name a key which is hardest to turn.

John: "Hi Teacher, What is your favourite movie ?".
Chemistry Teacher: "Indium Cerium Platinum Iodine Oxygen Nitrogen".
Ten seconds later... John replied I got it.

Do you?

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?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

You bought me for dinner but never eat me. What am I?

What can you catch but never throw?

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?