It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

Which is the smallest number that you can write using all the vowels exactly once?

A tourist visits a small town for his research. While in the town, he decides to get a haircut. Since the town is quite small, there are only two barbers in the town � one on the North Street and one on the South Street. The barbershop on the North Street is a mess and the barber has a weird and pathetic haircut. While the barbershop at the South Street is pretty tidy and the barber as well has an impressive haircut.

Which barbershop will the tourist visit for his haircut and why?

What Does this text mean:

important=important

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

What goes through cities and fields, but never moves?

The King of a distant land had heard that Birbal was one of the wisest men in the East and so desired to meet Birbal. He sent Birbal an invitation to visit his country.

In due course, Birbal arrived in the distant kingdom. When he entered the palace he was flabbergasted to find not one but six kings seated there. All looked alike. All were dressed in kingly robes. Who was the real king?

The very next moment he got his answer. Confidently, he approached the king and bowed to him.

How did Birbal know who was the real king?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?