The more you take me, the more you leave me behind.
Who Am I?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

Can you count the number of squares in the given picture?

What is the next number?

77, 49, 36, 18 ?

You along with your friend are standing in front of two houses. Each of those houses inhabits a family with two children.

Your friend tells you the below two facts:
1) On your left is a family that has a boy who likes accounts but the other child loves science.
2) On the right is a family with a seven-year-old boy and a newborn baby.

You ask him, "Does either of the family have a girl?"

To this, he replies, "I am not quite sure. But can you guess that? If you are right, I will give you $500."

Which family do you think is likely to have a girl?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Can you find out the total number of triangles in the given figure?

What word does this rebus represent?

meta meta
meta meta

I am the fastest animal but cannot climb the tree. What am I?

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.