You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

Do You See It?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

How many letters are in the alphabet?

What word begins and ends with an E, but has only one letter?

Before Mount Everest was discovered, what was the highest mountain in the world?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

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