What has to be broken before you can use it?

I travel all around the world but always stay in the corner. What am I?

What has 88 keys?

What can jump higher than a building?

Find the missing number in the sequence below:

What is the word or phrase?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Take away the whole and some still remain. What is it?

1. How can we put an elephant in the refrigerator?
2. How can we put a Giraffe in a refrigerator?
3. The king of the jungle invites all the animals to a party everyone comes except for one animal, which animal?
4. You come to a crocodile-infested lake, you can't go around it, you can't co under it and you can't go over it, how do you get across?

What is always in front of you but can’t be seen?