What has one letter and starts with an E?

This one is a popular quiz/puzzle. Can you find out the names of the websites depicted using the emojis in this picture?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

what does this below rebus represent identXQQQQQME

I have a head like a cat and feet like a cat, but I am not a cat. What am I?