A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

If 21x = 79x, what is the value of x?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

What number comes next in this sequence:
7 8 5 5 3 4 4 _

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Find the missing number: 1, 2, 3, 10, 10, ?, 9,802

As shown in the picture below, we can see a boy hanging on the tree branch to save his life. There are various ways in which he can die like1. A snake hanging toward the right waiting to bite the boy.2. A roaring Lion near the tree.3. Two crocodiles are ready to attack if the boy reaches near water. The tree is chopped to some extent, so can fall as if he moves a lot. Can you give this boy an escape plan?

If EELS + MARK + BEST + WARY = EASY

What does HELP + BARK + WARD + LEAD equal?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.