You can see it everyday, But cannot touch it at will. What is it?

What is the below Rebus indicate?

What time is it when an elephant sits on a fence?

What is the fastest way to double your money?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

I make two people out of one. What am I?

You see me once in June, twice in November, and not at all in May. What am I?

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

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

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?